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Volumn 10, Issue 16, 2004, Pages 4080-4090

Effect of conformational changes on a one-electron reduction process: Evidence of a one-electron P-P bond formation in a bis(phosphinine)

Author keywords

Aromaticity; Density functional calculations; Electron transfer; EPR spectroscopy; Fluxionality; P ligands

Indexed keywords

ELECTRON REDUCTION; ELECTRON TRANSFER; SPECTRAL MODIFICATIONS;

EID: 4444321352     PISSN: 09476539     EISSN: None     Source Type: Journal    
DOI: 10.1002/chem.200400073     Document Type: Article
Times cited : (30)

References (32)
  • 14
    • 0032571485 scopus 로고    scopus 로고
    • For other odd-electron bonds studies see: Y. Canac, D. Bourissou, A. Baceiredo, H. Gornitzka, W. W. Scholer, G. Bertrand, Science 1998, 279, 2080-2082; H. Grützmacher, F. Breher, Angew. Chem. 2002, 114, 4178-4184; Angew. Chem. Int. Ed. 2002, 41, 4006-4011.
    • (2002) Angew. Chem. , vol.114 , pp. 4178-4184
    • Grützmacher, H.1    Breher, F.2
  • 15
    • 0037021045 scopus 로고    scopus 로고
    • For other odd-electron bonds studies see: Y. Canac, D. Bourissou, A. Baceiredo, H. Gornitzka, W. W. Scholer, G. Bertrand, Science 1998, 279, 2080-2082; H. Grützmacher, F. Breher, Angew. Chem. 2002, 114, 4178-4184; Angew. Chem. Int. Ed. 2002, 41, 4006-4011.
    • (2002) Angew. Chem. Int. Ed. , vol.41 , pp. 4006-4011
  • 19
    • 4444220369 scopus 로고    scopus 로고
    • See Supporting Information
    • See Supporting Information.
  • 20
    • 4444255646 scopus 로고    scopus 로고
    • note
    • Additional experiments showed that the intensity ratio (A/B) measured on the frozen solution spectra was sensitive to additional factors such as the concentration ratio of sodium naphthalenide/phosphinine 2.
  • 21
    • 4444293203 scopus 로고    scopus 로고
    • note
    • At 100 K, only the B lines in Figure 3 a were observed after reduction was carried out with sodium naphthalenide in the absence of cryptand. Although a frozen solution spectrum could not be clearly recorded upon reduction of 2 with a sodium mirror, a broad doublet (40 G) was observed at 200 K. The signals observed upon reduction with naphthalenide or alkali metal were also detected after in situ electrolysis of a THF solution of 2 in the EPR cavity. However, with this method additional lines were observed that can tentatively be attributed to protonation of the radical anion by traces of water in the electrolytic cell.
  • 23
    • 4444262397 scopus 로고    scopus 로고
    • note
    • 31P tensor is reminiscent of previous observation made for phosphinyl radicals.
  • 25
    • 4444298709 scopus 로고    scopus 로고
    • note
    • We cannot exclude that an intermolecular one-electron P-P bond is not formed in the frozen solution. Such a reaction between a localized radical anion and a neutral phosphinine would decrease the amount of localized radical anions responsible for signals of type A1 and A2.
  • 27
    • 4444346041 scopus 로고    scopus 로고
    • note
    • 1H isotropic couplings decrease.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.