A novel series of sulphur-bridged ruthenium-molybdenum complexes:: [(RaaiR')2 Ru(μ-S)2Mo(OH)2].: Synthesis, spectroscopic and electrochemical characterization.: RaaiR'=1-alkyl-2-(arylazo) imidazole

被引：11
作者：
Byabartta, P [1 ]
机构：
[1] Univ Burdwan, Dept Chem, Burdwan 713104, W Bengal, India
来源：
TRANSITION METAL CHEMISTRY | 2005年 / 30卷 / 05期
关键词：
D O I：
10.1007/s11243-005-4051-1
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The reaction of ctc-[Ru(RaaiR')(2)Cl-2] (1) [RaaiR' = 1-alkyl-2-(arylazo) imidazole, p-R-C6H4-N=N-C3H2NN(1)-R', R = H (a), Me (b), Cl (c), R' = Me (2), Et (3), Bz (4) ] with (NH4)(2)MoS4 in aqueous MeOH afforded red-violet mixed ligand complexes of the type [(RaaiR')(2)Ru(mu-S)(2)Mo(OH)(2)] (2-4). In complexes (2-4) the terminal Mo=S bonds of the MoS42- unit become hydroxylated and the molybdenum ion is reduced from the starting Mo-VI in MoS42- to Mo-IV in the final product (2-4). The solution electronic spectra exhibit a strong MLCT band at 550-570 nm in DCM. Cyclic voltammograms show a Ru(III)/Ru(II) couple at 1.10-1.4 V, irreversible Mo(IV)/Mo(V) oxidations in the 1.66-1.72 V range, along with four successive reversible ligand reductions in the range -0.45-0.67 V (one electron), 0.82-1.12 V (one electron), and -1.44-1.90 V (simultaneously two electrons).
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页码：575 / 581
页数：7
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