Ruthenium hydrides bearing SbPh3 and AsPh3 ligands:: characterization of the bis(dihydrogen) complexes [Cp*Ru(H2)2(EPh3)]+ (Cp* = C5Me5; E = Sb, As)

被引：8
|
作者：
Aneetha, H [1 ]
Tenorio, MJ [1 ]
Puerta, MC [1 ]
Valerga, P [1 ]
机构：
[1] Univ Cadiz, Fac Ciencias, Dept Ciencia Mat Ingn Met & Quim Inorgan, E-11510 Puerto Real, Cadiz, Spain
来源：
JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2002年 / 663卷 / 1-2期
关键词：
hydride complexes; dihydrogen complexes; ruthenium; stibine; arsine;
D O I：
10.1016/S0022-328X(02)01965-4
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Reaction of NaBH4 with [Cp*RUCl2(EPh3)] (E = Sb la, As 1b) in THF/EtOH affords the trihydride complexes [Cp*RuH3(EPh3)] (E = Sb 2a, As 2b) in good yield. These trihydrides are protonated by HBF4.OEt2 in CH2Cl2 at -80 degreesC furnishing the cationic bis(dihydrogen) complexes [Cp*Ru(H-2)(2)(EPh3)][BF4] (E = Sb 3a, As 3b), which were characterized in solution by T, and (1)J(HD) measurements. These species are unstable and decompose at T > 0 degreesC. The reaction of [Cp*RuCl(SbPh3)(2)] with H-2 and NaBAr4' in fluorobenzene yields the dihydride [Cp*RuH2(SbPh3)(2)][BAr4'] (5). Protonation of the monohydride [Cp*RuH(SbPh3)(2)] (6) by HBF4.OEt2 in CH2Cl2 at -80 degreesC generates the dihydrogen complex [Cp*Ru(H-2)(SbPh3)(2)](+) (7), which rearranges to its dihydride tautomer 5 when the temperature is raised. (C) 2002 Elsevier Science B.V. All rights reserved.
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页码：151 / 157
页数：7
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