Bibliography
Senge, M. O., Gerzevske, K. R., Vicente, M. G. H., Forsyth, T. P., & Smith, K. M. (1993). Models for the Photosynthetic Reaction CenterâSynthesis and Structure of Porphyrin Dimers with cisâ and transâEthene and Skewed Hydroxymethylene Bridges. Angewandte Chemie International Edition in English, 32(5), 750â753. Portico.
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- Crystal structure analyses of thetransdimers proved to be very difficult. Due to the insolubility of4aand4cno crystals were obtained for the Cu and Zn complexes; likewise we have not yet been able to grow crystals of4d. Brown cubes of4bwere obtained from CHCl3/CH3OH. C74H88N8Ni22CHCl3 triclinic space groupP1 a= 10.286(1) b= 12.812(2) c= 14.775(2) Å α = 104.64(1) β = 108.46(1) γ = 95.66(1)° V= 1752.8(7) Å3; data collection at 126 K with CuKαradiation. The structure solution revealed all atoms including two CHCl3molecules of salvation and clearly showed thetransconfiguration of the connecting double bond. However refinement belowR= 0.19 was not possible due to systematic twinning problems.
- Characterization of the NiIIcisandtransdimers:4b: m.p. > 300°C; UV/VIS (CH2Cl2): λmax[nm](ϵ) = 414 (1.599 × 105) 488 (30400) 530 (20740) 566 (22760).1H NMR (300 MHz CDCl3 25°C): δ = 9.50 (s 2H meso) 9.48(s 4H meso) 7.66 (s 2H CH CH) 3.88 (m 16H CH2) 3.76 (q 8H CH2) 3.37 (m br 8H CH2) 1.83 1.82 (t 12H each CH3) 1.75 (t 12H CH3) 1.02 (t 12H CH3).5b: m.p. > 300°C; UV/VIS (CH2Cl2): λmax[nm](ϵ) = 393 (1.682 × 105) 435 (12190) 568 (14650).1H NMR (300 MHz CDCI3 25°C): δ = 9.30 9.05 (s 2H each mesoand CH CH) 8.06 (s 4H meso) 4.03 3.84 3.75 3.57 3.47 2.89 (m 4H each CH2) 2.60 (s 8H CH2) 1.83 (m 12H CH3) 1.43–1.53 (m 24H CH3) 0.67 (t 12H CH3). Thecisandtransisomers can easily be separated based on solubility properties.
- Crystal structure data of5a(crystallized from CH2Cl2/CH3OH): C74H88N8Cu2 Mr= 1216.6 monoclinic space groupP21/n a= 19.208(7) b= 14.672(5) c= 24.170(7) Å β = 111.15(3)° V= 6352(4) Å3 (Z= 4; ρcalcd= 1.271 Mgm−3; μMoKα) = 0.718 mm−1. Data collection on a Siemens R3m/V diffractometer at 130 K with MoKαradiation (λ = 0.71073 Å) and a graphite monochromator; crystal size: 0.52 × 0.32 × 0.21 mm. Patterson synthesis refinement by least‐squares on |F| all atoms refined with anisotropic thermal parameters H atoms incorporated using a riding model R= 0.056 wR= 0.064 S= 1.22; 8040 reflections observed withF> 5.0 σ(F) 2θmax= 55° [14].
- Further details of the crystal structure investigations may be obtained from the Fachinformationszentrum Karlsruhe Gesellschaft für wissenschaftlich‐technische Information mbH D‐W‐7514 Eggenstein‐Leopoldshafen 2 on quoting the depository number CSD‐57206 the name of the authors and the journal citation.
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- Crystal structure data of6(crystallized from CH2Cl2/CH3OH): C69H80N8O·CH2Cl2 Mr= 1255.7 monoclinic space groupC2/c a= 40.31(2) b= 14.997(7) c= 21.954(11) Å β = 108.60(4)° V= 12 579(10)Å3 Z= 8; (ρcalcd= 1.305 Mg m−3; μMoKα) = 0.735 mm−1. Data collection on a a Syntex P21diffractometer at 130 K with MoKαradiation (λ = 0.71073 Å) and a graphite monochromator; crystal size: 0.35 × 0.22 × 0.11 mm. Patterson synthesis refinement by least‐squares on |F| only metal nitrogen and side chain atoms were refined with anisotropic thermal parameters H atoms incorporated using a riding model one ethyl group and the hydroxyl group were disordered R= 0.122 wR= 0.120 S= 1.45; 5146 reflections observed withF> 2.0 σ(F) 2θmax = 48°[14].
10.1021/ja00230a063
10.1016/1011-1344(92)85150-S
Dates
Type | When |
---|---|
Created | 21 years, 7 months ago (Dec. 30, 2003, 5:09 p.m.) |
Deposited | 1 year, 10 months ago (Oct. 10, 2023, 11:32 a.m.) |
Indexed | 1 year ago (Aug. 26, 2024, 4:26 a.m.) |
Issued | 32 years, 3 months ago (May 1, 1993) |
Published | 32 years, 3 months ago (May 1, 1993) |
Published Online | 21 years, 8 months ago (Dec. 22, 2003) |
Published Print | 32 years, 3 months ago (May 1, 1993) |
@article{Senge_1993, title={Models for the Photosynthetic Reaction Center—Synthesis and Structure of Porphyrin Dimers with cis‐ and trans‐Ethene and Skewed Hydroxymethylene Bridges}, volume={32}, ISSN={0570-0833}, url={http://dx.doi.org/10.1002/anie.199307501}, DOI={10.1002/anie.199307501}, number={5}, journal={Angewandte Chemie International Edition in English}, publisher={Wiley}, author={Senge, Mathias O. and Gerzevske, Kevin R. and Vicente, M. Graça H. and Forsyth, Timothy P. and Smith, Kevin M.}, year={1993}, month=may, pages={750–753} }