Supporting Information
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- Πυθις Δασκαλόπουλος
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1 Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2015 Supporting Information Sequentially palladium catalyzed coupling-cyclocondensation-coupling (C 3 ) four-component synthesis of intensively blue luminescent biarylsubstituted pyrazoles Melanie Denißen, 1 Jan Nordmann, 1 Julian Dziambor, 1 Walter Frank, 2 and Thomas J. J. Müller*,1 1 Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine- Universität Düsseldorf, Universitätsstraße 1, Düsseldorf, Germany. 2 Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, Düsseldorf, Germany. Table of contents General Considerations... 3 One-pot Synthesis of 1-methyl-3,5-diphenyl-1H-pyrazole (9)... 3 Spectra of 5-Biarylsubstituted Pyrazoles Methyl-5-(4'-methyl-[1,1'-biphenyl]-4-yl)-3-phenyl-1H-pyrazole (5a) ([1,1'-Biphenyl]-4-yl)-1-methyl-3-phenyl-1H-pyrazole (5b) (4'-Fluoro-2'-methyl-[1,1'-biphenyl]-4-yl)-1-methyl-3-phenyl-1H-pyrazole (5c) (2-Fluorophenyl)-1-methyl-5-(4'-methyl-[1,1'-biphenyl]-4-yl)-1H-pyrazole (5d) Methyl-5-(4'-methyl-[1,1'-biphenyl]-4-yl)-3-(thiophen-2-yl)-1H-pyrazole (5e) (4'-Methoxy-[1,1'-biphenyl]-4-yl)-1-methyl-3-(thiophen-2-yl)-1H-pyrazole (5f) (4'-Methyl-[1,1'-biphenyl]-4-yl)-3-phenyl-1H-pyrazole (5g) Spectra of 3-Biarylsubstituted Pyrazoles ([1,1'-Biphenyl]-4-yl)-1-methyl-5-phenyl-1H-pyrazole (6a) (4'-fluoro-2'-methyl-[1,1'-biphenyl]-4-yl)-1-methyl-5-(p-tolyl)-1H-pyrazole (6b) ([1,1'-biphenyl]-4-yl)-5-butyl-1-methyl-1H-pyrazole (6c) (1-methyl-5-phenyl-1H-pyrazol-3-yl)-[1,1 -biphenyl]-4-carbonitrile (6d) Spectra of the 3,5-Di([1,1'-biphenyl]-4-yl)-1-methyl-1H-pyrazole (7) Spectra of 1-Biarylsubstituted Pyrazoles ([1,1'-biphenyl]-4-yl)-3,5-diphenyl-1H-pyrazole (8a) (4'-methyl-[1,1'-biphenyl]-4-yl)-3,5-diphenyl-1H-pyrazole (8b)
2 4'-(3,5-diphenyl-1H-pyrazol-1-yl)-[1,1'-biphenyl]-4-carbonitrile (8c) (4-(5-methylthiophen-2-yl)phenyl)-3,5-diphenyl-1H-pyrazole (8d) (4-methoxyphenyl)-1-(4'-methyl-[1,1'-biphenyl]-4-yl)-3-phenyl-1H-pyrazole (8e) (2-chlorophenyl)-1-(4'-methyl-[1,1'-biphenyl]-4-yl)-3-phenyl-1H-pyrazole (8f) (4'-methyl-[1,1'-biphenyl]-4-yl)-3-phenyl-5-(thiophen-2-yl)-1H-pyrazole (8g) butyl-1-(4'-methyl-[1,1'-biphenyl]-4-yl)-5-phenyl-1H-pyrazole (8h) Spectra of 1-methyl-3,5-diphenylpyrazole (9) Computed xyz-coordinates of the S 0 State for the Pyrazoles 5c, 5d, 6d, and XYZ-coordinates for 5c XYZ-coordinates for 5d XYZ-coordinates for 6d XYZ-coordinates for 8b Computed UV/Vis Spectra of TD-DFT Calculated Structures of 5c, 5d, 6d, and 8b Computed xyz-coordinates of the S 1 State of Pyrazole 5d Computed xyz-coordinates of the S 1 State of Pyrazole 6d
3 General Considerations 1 H, 13 C, DEPT and NOESY NMR spectra were recorded in CDCl 3, CDCl 2 or acetone (d 6 ) on a 300 MHz (Bruker AVIII) or 600 MHz (Bruker Avance III-600) NMR spectrometer. The assignments of C quat, CH, CH 2 and CH 3 were based on DEPT spectra. Absorption spectra were recorded in CH 2 Cl 2 or cyclohexane UVASOL at T = 293 K on a Perkin Elmer UV/VIS/NIR Spectrometer Lambda 19. Emission spectra were recorded in CH 2 Cl 2 or cyclohexane UVASOLat T = 293 K on a Perkin Elmer LS55 spectrometer. One-pot Synthesis of 1-methyl-3,5-diphenyl-1H-pyrazole (9) 1 In a 10 ml microwave tube PdCl 2 (PPh 3 ) 2 (14.6 mg, 0.02 mmol) and CuI (8.37 mg, 0.04 mmol) were dissolved in THF (4.00 ml) under nitrogen. To the yellow solution acid chloride (1a) (141 mg, 1.00 mmol) and alkyne (2b) (103 mg, 1.00 mmol) were added. Finally triethylamine (107 mg, 1.05 mmol) was added. The reaction mixture turned from yellow to light brown and was stirred at room temperature for 2 h. Then methyl hydrazine (3a) (52.8 mg, 1.14 mmol), 0.5 ml methanol and 0.5 ml concentrated acetic acid were added and the reaction mixture was stirred under continuous microwave irradiation at 150 C for 10 min. After cooling to room temperature the reaction mixture was extracted with dichloromethane (3 x 20 ml) and then washed with a saturated aqueous solution of ammonium chloride and brine. The combined organic layers were dried with anhydrous magnesium sulfate. The crude product was purified by flash chromatography (n-hexane/ethyl acetate 4:1, v/v) to give 151 mg (66%) of pyrazole 9 as a yellow to orange solid; Mp 55 C. 1 H NMR (300 MHz, CDCl 3 ) = 3.94 (s, 3 H), 6.62 (s, 1 H), (m, 1 H), (m, 2 H), (m, 5 H), 7.84 (dd, J = 8.3, 1.3 Hz, 2H), 13 C NMR (75 MHz, CDCl 3 ) = 37.6 (CH 3 ), (CH), (2 CH), , , (2 CH), (2 CH), (C quat ), (C quat ), (C quat ), (C quat ), IR (ATR): [cm -1 ] 3026 (w), 2962 (w), 1603 (w), 1551 (w), 1485 (m), 1460 (m), 1439 (m), 1362 (w), 1260 (m), 1088 (m), 1074 (m), 1026 (m), 1007 (m), 959 (m), 916 (w), 792 (s), 762 (s), 745 (s), 729 (s), 692 (s), 671 (m). GC-MS (m/z (%)): 235 (18), 234 (100), 233 (24), 191 (4), 189 (5), 131 (3), 130 (8), 128 (3), 118 (8), 117 (6), 116 (4), 104 (8), 103 (9), 102 (4), 95 (3), 91 (8), 89 (4), 77 (15), 76 (3), 63 (3), 51 (5). UV/Vis (CH 2 Cl 2 ): max [nm] ( [Lcm -1 mol -1 ]) = (28800). Emission (CH 2 Cl 2 ): max [nm] ( f ) = (0.40). Stokes shift [cm -1 ] = B. Willy and T. J. J. Müller, Eur. J. Org. Chem., 2008,
4 Spectra of 5-Biarylsubstituted Pyrazoles 5 1-Methyl-5-(4'-methyl-[1,1'-biphenyl]-4-yl)-3-phenyl-1H-pyrazole (5a) 300 MHz 1 H NMR spectrum of compound 5a recorded in CDCl 3 at T = 298 K (δ in ppm). 75 MHz 13 C NMR spectrum of compound 5a recorded in CDCl 3 at T = 298 K (δ in ppm). 4
5 Normalized absorption and emission spectra of compound 5a recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 5-([1,1'-Biphenyl]-4-yl)-1-methyl-3-phenyl-1H-pyrazole (5b) f1 (ppm) MHz 1 H NMR spectrum of compoundd 5b recorded inn CDCl 3 at T = 298 K (δ in ppm). 5
6 f1 (ppm) MHz 13 C NMR spectrum of compoundd 5b recorded inn CDCl 3 at T = 298 K (δ in ppm) ). Normalized absorption and emission spectra of compound 5b recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 6
7 5-(4'-Fluoro-2'-methyl-[1,1'-biphenyl]-4-yl)-1-methyl-3-phenyl-1H-pyrazole (5c) 300 MHz 1 H NMR spectrum of compound 5crecorded in CDCl 3 at T = 298 K (δ in ppm). 75 MHz 13 C NMR spectrum of compound 5c recorded in CDCl 3 at T = 298 K (δ in ppm). 7
8 Normalized absorption and emission spectra of compound 5c recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 3-(2-Fluorophenyl) -1-methyl-5-(4'-methyl-[1,1'-biphenyl]-4-yl)-1H-pyrazole (5d) f1 (ppm) MHz 1 H NMR spectrum of compoundd 5d recorded inn CDCl 3 at T = 298 K (δ in ppm). 8
9 f1 (ppm) MHz 13 C NMR spectrum of compoundd 5d recorded inn CDCl 3 at T = 298 K (δ in ppm) ). Normalized absorption and emission spectra of compound 5d recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 9
10 1-Methyl-5-(4'-methyl-[1,1'-biphenyl]-4-yl)-3-(thiophen-2-yl)-1H-pyrazole (5e) 600 MHz 1 H NMR spectrum of compound 5e recorded in CDCl 3 at T = 298 K (δ in ppm). 125 MHz 13 C NMR spectrum of compound 5e recorded in CDCl 3 at T = 298 K (δ in ppm). 10
11 Normalized absorption and emission spectra of compound 5e recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 5-(4'-Methoxy-[1,1' '-biphenyl]-4-yl)-1-methyl-3-(thiophen-2-yl)-1h-pyrazole (5f) f1 (ppm) MHz 1 H NMR spectrum of compoundd 5f recorded inn CDCl 3 at T = 298 K (δ in ppm). 11
12 f1 (ppm) MHz 13 C NMR spectrum of compoundd 5f recorded in CDCl 3 at T = 298 K (δ in ppm). Normalized absorption and emission spectra of compound 5f recorded in CH 2 Cl 2 UVASOL at T = 293 K ( exc = 290 nm). 12
13 5-(4'-Methyl-[1,1'-biphenyl]-4-yl)-3-phenyl-1H-pyrazole (5g) 300 MHz 1 H NMR spectrum of compound 5g recorded in d 6 -acetone at T = 298 K (δ in ppm). 75 MHz 13 C NMR spectrum of compound 5g recorded in d 6 -acetone at T = 298 K (δ in ppm). 13
14 Normalized absorption and emission spectra of compound 5g recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n Spectra of 3-Biarylsubstituted Pyrazoles 6 3-([1,1'-Biphenyl]-4-yl)-1-methyl-5-phenyl-1H-pyrazole (6a) f1 (ppm) MHz 1 H NMR spectrum of compoundd 6a recorded inn CDCl 3 at T = 298 K (δ in ppm) ). 14
15 f1 (ppm) MHz 13 C NMR spectrum of compoundd 6a recorded inn CDCl 3 at T = 298 K (δ in ppm). Normalized absorption and emission spectra of compound 6a recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 15
16 3-(4'-fluoro-2'-methyl-[1,1'-biphenyl]-4-yl)-1-methyl-5-(p-tolyl)-1H-pyrazole (6b) 300 MHz 1 H NMR spectrum of compound 6b recorded in CDCl 3 at T = 298 K (δ in ppm). 75 MHz 13 C NMR spectrum of compound 6b recorded in CDCl 3 at T = 298 K (δ in ppm). 16
17 Normalized absorption and emission spectra of compound 6b recorded in CH 2 Cl 2 UVASOL at T = 2933 K (λ exc = 290 nm). 3-([1,1'-biphenyl]-4-yl)-5-butyl-1-methyl-1H-pyrazolee (6c) f1 (ppm) MHz 1 H NMR spectrum of compoundd 6c recorded inn CDCl 3 at T = 298 K (δ in ppm). 17
18 f1 (ppm) MHz 13 C NMR spectrum of compoundd 6c recorded inn CDCl 3 at T = 298 K (δ in ppm). Normalized absorption and emission spectra of compound 6c recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 18
19 4 -(1-methyl-5-phenyl-1H-pyrazol-3-yl)-[1,1 -biphenyl]-4-carbonitrile (6d) 300 MHz 1 H NMR spectrum of compound 6d recorded in CD 2 Cl 2 at T = 298 K (δ in ppm). 75 MHz 13 C NMR spectrum of compound 6d recorded in CD 2 Cl 2 at T = 298 K (δ in ppm). 19
20 Normalized absorption and emission spectra of compound 6d recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n Spectra of the 3,5-Di([1,1'-biphenyl]-4-yl)-1-methyl-1H-pyrazole (7) f1 (ppm) MHz 1 H NMR spectrum of compoundd 7 recorded in CDCl 3 at T = 298 K (δ in ppm). 20
21 f1 (ppm) MHz 13 C NMR spectrum of compoundd 7 recorded in CDCl 3 at T = 298 K (δ in ppm). Normalized absorption and emission spectra of compound 7 recorded in CH 2 Cl 2 UVASOL at T = 293 K ( exc = 290 nm). 21
22 Spectra of 1-Biarylsubstituted Pyrazoles 8 1-([1,1'-biphenyl]-4-yl)-3,5-diphenyl-1H-pyrazole (8a) 300 MHz 1 H NMR spectrum of compound 8a recorded in CDCl 3 at T = 298 K (δ in ppm). 75 MHz 13 C NMR spectrum of compound 8a recorded in CDCl 3 at T = 298 K (δ in ppm). 22
23 Normalized absorption and emission spectra of compound 8a recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). 1-(4'-methyl-[1,1'-biphenyl]-4-yl)-3,5-diphenyl-1H-pyrazole (8b) f1 (ppm) MHz 1 H NMR spectrum of compoundd 8b recorded inn CDCl 3 at T = 298 K (δ in ppm). 23
24 f1 (ppm) MHz 13 C NMR spectrum of compoundd 8b recorded inn CDCl 3 at T = 298 K (δ in ppm) ). Normalized absorption and emission spectra of compound 8b recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 24
25 4'-(3,5-diphenyl-1H-pyrazol-1-yl)-[1,1'-biphenyl]-4-carbonitrile (8c) 300 MHz 1 H NMR spectrum of compound 8c recorded in CDCl 3 at T = 298 K (δ in ppm). 75 MHz 13 C NMR spectrum of compound 8c recorded in CDCl 3 at T = 298 K (δ in ppm). 25
26 Normalized absorption and emission spectra of compound 8c recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 1-(4-(5-methylthiophen-2-yl)phenyl)-3,5-diphenyl-1H-pyrazole ( 8d) f1 (ppm) MHz 1 H NMR spectrum of compoundd 8d recorded inn CDCl 3 at T = 298 K (δ in ppm). 26
27 f1 (ppm) MHz 13 C NMR spectrum of compound 8d recorded in CDCl 3 at T = 298 K (δ in ppm). Normalized absorption and emission spectra of compound 8d recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 27
28 5-(4-methoxyphenyl)-1-(4'-methyl-[1,1'-biphenyl]-4-yl)-3-phenyl-1H-pyrazole (8e) 600 MHz 1 H NMR spectrum of compound 8e recorded in CDCl 3 at T = 298 K (δ in ppm). 125 MHz 13 C NMR spectrum of compound 8e recorded in CDCl 3 at T = 298 K (δ in ppm). 28
29 Normalized absorption and emission spectra of compound 8e recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 5-(2-chlorophenyl)-1-(4'-methyl-[1,1'-biphenyl]-4-yl)-3-phenyl-1H-pyrazole (8f) f1 (ppm) MHz 1 H NMR spectrum of compoundd 8f recorded inn CDCl 3 at T = 298 K (δ in ppm). 29
30 f1 (ppm) MHz 13 C NMR spectrum of compound 8f recorded inn CDCl 3 at T = 298 K (δ in ppm). Normalized absorption and emission spectra of compound 8f recorded in CH 2 Cl 2 UVASOL at T = 293 K ( exc = 290 nm). 30
31 1-(4'-methyl-[1,1'-biphenyl]-4-yl)-3-phenyl-5-(thiophen-2-yl)-1H-pyrazole (8g) 300 MHz 1 H NMR spectrum of compound 8g recorded in CDCl 3 at T = 298 K (δ in ppm). 75 MHz 13 C NMR spectrum of compound 8g recorded in CDCl 3 at T = 298 K (δ in ppm). 31
32 Normalized absorption and emission spectra of compound 8g recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 3-butyl-1-(4'-methyl-[1,1'-biphenyl]-4-yl)-5-phenyl-1H-pyrazole (8h)( f1 (ppm) MHz 1 H NMR spectrum of compoundd 8h recorded inn CDCl 3 at T = 298 K (δ in ppm). 32
33 f1 (ppm) MHz 13 C NMR spectrum of compoundd 8h recorded inn CDCl 3 at T = 298 K (δ in ppm) ). Normalized absorption and emission spectra of compound 8h recorded in CH 2 Cl 2 UVASOL at T = 2933 K ( exc = 290 nm). n 33
34 Spectra of 1-methyl-3,5-diphenylpyrazole (9) 300 MHz 1 H NMR spectrum of compoundd 9 recorded in CDCl 3 at T = 298 K (δ in ppm). 75 MHz 13 C NMR spectrum of compoundd 9 recorded in CDCl 3 at T = 298 K (δ in ppm). 34
35 Normalized absorption and emission spectra of compound 9 recorded in CH 2 Cl 2 UVASOL at T = 293 K ( exc = 290 nm). 35
36 Crystal Data and Structure Refinement for Pyrazole 8b Empirical formula C 28 H 22 N 2 Formula weight Temperature Wavelength Crystal system 291(2) K Å orthorhombic Space group Pca2 1 Unit cell dimensions a = (4) Å α= 90. b = (4) Å β= 90. c = (6) Å γ= 90. Volume (13) Å3 Z 4 Density (calculated) Mg/m 3 Absorption coefficient mm -1 F(000) 816 Crystal size 0.5 x 0.5 x 0.5 mm 3 Theta range for data collection 2.72 to Index ranges -10<=h<=10, -13<=k<=13, -23<=l<=20 Reflections collected Independent reflections 3321 [R(int) = ] Completeness to theta = % Refinement method Full-matrix least-squares on F2 Data / restraints / parameters 3321 / 1 / 272 Goodness-of-fit on F Final R indices [I>2sigma(I)] R1 = , wr2 = R indices (all data) R1 = , wr2 = Absolute structure parameter 0(3) Largest diff. peak and hole and e.å-3 36
37 ORTEP plot of thex-ray structur of compound 8b. Computed xyz-coordinates of the S 0 State for the Pyrazoles 5c, 5d, 6d, and 8 The ground state geometries of the pyrazoles weree optimized in a DFT calculation with the B3LYP functional and the 6-311G(d,p) basis set in the program packagee Gaussian09. The minima structures were confirmed by analytical frequency analysis. Computational details of the calculated pyrazoles: XYZ-coordinates for 5c C C C N N C C C C
38 C C C C C C C C C C C C C C C F C H H H H H H H H
39 H H H H H H H H H H H SCF Done: E(RB3LYP) = A.U. after 12 cycles Sum of electronic and zero-point Energies= Sum of electronic and thermal Energies= Sum of electronic and thermal Enthalpies= Sum of electronic and thermal Free Energies= XYZ-coordinates for 5d C C C C C
40 C C N N C C C C C C C C C C C C C C C C F H H H H
41 H H H H H H H H H H H H H H H SCF Done: E(RB3LYP) = A.U. after cycles Sum of electronic and zero-point Energies= Sum of electronic and thermal Energies= Sum of electronic and thermal Enthalpies= Sum of electronic and thermal Free Energies= singlet a excitation Total energy: Excitation energy:
42 Excitation energy / ev: Excitation energy / nm: Excitation energy / cm^(-1): XYZ-coordinates for 6d C C C N N C C C C C C C C C C C C C C
43 C C C C C C N H H H H H H H H H H H H H H H H H
44 SCF Done: E(RB3LYP) = A.U. after 13 cycles Sum of electronic and zero-point Energies= Sum of electronic and thermal Energies= Sum of electronic and thermal Enthalpies= Sum of electronic and thermal Free Energies= XYZ-coordinates for 8b C C C C C C C C C C C C N C C C N
45 C C C C C C C C C C C C H H H H H H H H H H H H H
46 H H H H C H H H H H SCF Done: E(RB3LYP) = A.U. after 6 cycles Sum of electronic and zero-point Energies= Sum of electronic and thermal Energies= Sum of electronic and thermal Enthalpies= Sum of electronic and thermal Free Energies=
47 Computed UV/Vis Spectra of TD-DFT Calculated Structures of 5c, 5d, 6d, and 8b The optimized structures were used in a TD-DFT calculation using the hybrid exchangecorrelation functional CAM-B3LYP. First four dominant transitions of the first excited state for 5c regarding to the oscillatory strength: 1) 256 nm, oscillator strength: , orbitals involved: HOMO-1 LUMO, HOMO LUMO, HOMO LUMO+1 2) 248 nm, oscillator strength: , orbitals involved: HOMO-1 LUMO+1, HOMO LUMO, HOMO LUMO+1 3) 218 nm, oscillator strength: , orbitals involved: HOMO-4 LUMO, HOMO-4 LUMO+2, HOMO-3 LUMO, HOMO-2 LUMO, HOMO-1 LUMO+1, HOMO-1 LUMO+5, HOMO LUMO+5 4) 203 nm, oscillator strength: , orbitals involved: HOMO-5 LUMO, HOMO-4 LUMO, HOMO-1 LUMO+2, HOMO-1 LUMO+3, HOMO LUMO+2, HOMO-1 LUMO+3 First four dominant transitions of the first excited state for 5d regarding to the oscillatory strength: 1) 258 nm, oscillator strength: , orbitals involved: HOMO-2 LUMO+4, HOMO-1 LUMO, HOMO LUMO 2) 244 nm, oscillator strength: , orbitals involved: HOMO-6 LUMO+2, HOMO-5 LUMO, HOMO-2 LUMO+2, HOMO LUMO+2 3) 237 nm, oscillator strength: , orbitals involved: HOMO-5 LUMO, HOMO-4 LUMO, HOMO-4 LUMO+4, HOMO-2 LUMO+2, HOMO-2 LUMO+3, HOMO- 1 LUMO+3, HOMO LUMO+3 4) 236 nm, oscillator strength: , orbitals involved: HOMO-7 LUMO+4, HOMO-6 LUMO+2, HOMO-3 LUMO+1, HOMO-1 LUMO+1, HOMO-1 LUMO+4, HOMO LUMO+1, HOMO LUMO+4 First four dominant transitions of the first excited state for 6d regarding to the oscillatory strength: 5) 298 nm, oscillator strength: , orbitals involved: HOMO-1 LUMO, HOMO LUMO, HOMO LUMO+3 47
48 6) 237 nm, oscillator strength: , orbitals involved: HOMO-1 LUMO, HOMO-1 LUMO+1, HOMO LUMO+1 7) 213 nm, oscillator strength: , orbitals involved: HOMO-5 LUMO, HOMO-4 LUMO, HOMO-3 LUMO, HOMO-1 LUMO,HOMO-1 LUMO+1,HOMO-1 LUMO+3,HOMO LUMO+1,HOMO LUMO+2 8) 210 nm, oscillator strength: , orbitals involved: HOMO-7 LUMO, HOMO-4 LUMO, HOMO-3 LUMO, HOMO-2 LUMO, HOMO LUMO, HOMO LUMO+3 First four dominant transitions of the first excited state for 8b regarding to the oscillatory strength: 1) 278 nm, oscillator strength: , orbitals involved: HOMO-2 LUMO+2, HOMO-1 LUMO+1, HOMO LUMO 2) 248 nm, oscillator strength: , orbitals involved: HOMO-7 LUMO+3, HOMO-6 LUMO, HOMO-6 LUMO+1, HOMO-5 LUMO, HOMO-2 LUMO, HOMO-1 LUMO+3, HOMO-1 LUMO+4, HOMO LUMO+2, HOMO LUMO+3, HOMO LUMO+4, HOMO LUMO+5 3) 245 nm, oscillator strength: , orbitals involved: HOMO-2 LUMO, HOMO-2 LUMO+2, HOMO-1 LUMO, HOMO-1 LUMO+1, HOMO-1 LUMO+2, HOMO LUMO+1, HOMO LUMO+2, HOMO LUMO+3 4) 242 nm, oscillator strength: , orbitals involved: HOMO-3 LUMO, HOMO-3 LUMO+2, HOMO-2 LUMO, HOMO-2 LUMO+1, HOMO-2 LUMO+6, HOMO-1 LUMO, HOMO-1 LUMO+1, HOMO-1 LUMO+2, HOMO-1 LUMO+6, HOMO LUMO+1, HOMO LUMO+6 Computed xyz-coordinates of the S 1 State of Pyrazole 5d The excited state geometry of the pyrazole 5d was optimized in a DFT calculation with the B3LYP functional and the 6-311G(d,p) basis set in the program package Gaussian09. XYZ-coordinates of the S 1 state for 5d: C C C
49 C C C C N N C C C C C C C C C C C C C C C C F H H
50 H H H H H H H H H H H H H H H H H singlet a excitation Total energy after PCM correction: Excitation energy: Excitation energy / ev: Excitation energy / nm: Excitation energy / cm^(-1):
51 Computed xyz-coordinates of the S 1 State of Pyrazole 6d The excited state structure of pyrazole 6d was optimized in a DFT calculation in the gasphase with the B3LYP functional and the def-tzvp basis set in the program package turbomole. The minimum structure was confirmed by a numerical frequency analysis. XYZ-coordinates of the S 1 state for 6d: C C C N N C C C C C C C C C C C C C C C
52 C C C C C N H H H H H H H H H H H H H H H H H ENERGY = a.u.; # of cycles = 32 52
53 The emission spectrum of compound 6d was computed after the numerical frequency analysis using the implementation egrad in the program package turbomole. 1 singlet a excitation Total energy: Excitation energy: Excitation energy / ev: Excitation energy / nm: Excitation energy / cm^(-1): Oscillator strength: velocity representation: length representation: mixed representation: Dominant contributions: occ. orbital energy / ev virt. orbital energy / ev coeff. ^2* a a
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