Mono- and bis-alkynyl ruthenium(II) complexes containing the ferrocenyl moiety;: crystal structure of trans-[Ru(CCC5H4FeC5H5)2(Ph2PCH2CH2PPh2)2] and electrochemical studies

被引:73
作者
Lebreton, C
Touchard, D
Le Pichon, L
Daridor, A
Toupet, L
Dixneuf, PH
机构
[1] Univ Rennes 1, Lab Chim Coordinat & Catalyse, UMR 6509 CNRS, F-35042 Rennes, France
[2] Univ Rennes 1, Phys Mat Condensee Lab, UMR 6626 CNRS, F-35042 Rennes, France
关键词
crystal structures; ruthenium complexes; alkynyl complexes; ferrocenyl complexes; electrochemistry;
D O I
10.1016/S0020-1693(97)05933-1
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The reaction of RuCl2(Ph2PCH2CH2PPh2)(2) (RuCl2(dppe)(2)) with the terminal alkynes FcC=CH or FcC=C-C=CH (Fc=ferrocenyl=-C5H4FeC5H5) in the presence of NaPF6 and a base afford mono- and bis-ferrocenylalkynyl-ruthenium complexes: Fc(C=C)(n)RuCl(dppe)(2) (n=1 (2), 2 (7)); (Fc(C=C)(n))(2)Ru(dppe)(2) (n=1 (3), 2 (8)); trans-(FcC=C)FcC=C-C=C-Ru(dppe)(2) (9). Starting from the vinylidene derivatives [X-C6H4CH=C=RuCl(dppe)(2)]+PF6- (4) the bis mixed alkynyl derivatives trans-X-C6H4-C=C-Ru-C=C-Fc(dppe)(2) (X=H (5a), NO2 (5b)) and O2N-C6H4-C=C-Ru-C=C-C=C-Fc(dppe)(2) (10) were formed. The protonation of 3 with NH4+PF6- allows access to [FcC=C-Ru(NH3)(dppe)(2)]PF6 (6). The X-ray structure of 3 was established. The redox properties of complexes 2-10 obtained by cylic voltammetry reveal that both ferrocenyl groups and Ru(dppe)(2) moieties oxidize reversibly. They especially show that the C=C bridge, butter than the C=C-C=C bridge, but also the Ru(dppe)(2) moiety allow electronic communication from one end of the linear organometallic molecule to the ferrocenyl group at the other end. (C) 1998 Elsevier Science S.A. All rights reserved.
引用
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页码:188 / 196
页数:9
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