Synthesis and co-ordination chemistry of perfluorovinyl phosphine derivatives.: Single crystal structures of PPh(CF=CF2)2, cis-[PtCl2{PPh2(CF=CF2)}2] and [{AuCl[PPh2(CF=CF2)]}2]

被引:45
作者
Banger, KK
Banham, RP
Brisdon, AK [1 ]
Cross, WI
Damant, G
Parsons, S
Pritchard, RG
Sousa-Pedrares, A
机构
[1] Univ Manchester, Inst Sci & Technol, Dept Chem, Manchester M60 1QD, Lancs, England
[2] Univ Edinburgh, Dept Chem, Edinburgh EH9 3JJ, Midlothian, Scotland
来源
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1999年 / 03期
关键词
D O I
10.1039/a806535g
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Reaction of perfluorovinyllithium, derived from CF3CH2F, with chloro-substituted phosphines generated perfluorovinylphosphines of the type PPhm(CF=CF2)(n) and P(CF=CF2)(n)Cl-m (n + m = 3) in high yields. A low-temperature crystal structure determination of the air- and moisture-stable compound PPh(CF=CF2)(2) provided the first reported structural data for any perfluorovinyl-containing material. There is considerable variation in the C-F bond distances [1.310(4), 1.321(4), 1.353(3) Angstrom] within the perfluorovinyl group in the phosphine. The co-ordination chemistry of these ligands has been investigated via the synthesis of examples of late transition-metal complexes. The results of single crystal structural determinations of cis-[PtCl2{PPh2(CF=CF2)}(2)] and [{AuCl[PPh2(CF=CF2)]}(2)]. 0.5CH(2)Cl(2) are reported. In both of these molecules short metal-phosphorus distances [d(Pt-P)(av) = 2.231(3) and d(Au-P)(av) = 2.217(2) Angstrom] are observed compared with typical distances for similar phosphine complexes. A comparison of the electronic properties of these ligands with those of other phosphines, halogenophosphines and phosphites was made on the basis of a spectroscopic investigation of the carbonyl stretching frequencies of the complexes [Mo(CO)(5){PPhm(CF=CF2)(n)}] (n + m = 3).
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页码:427 / 434
页数:8
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