Coordination chemistry of 3-mercapto-2-(mercaptomethyl)propanoic acid (dihydroasparagusic acid) with iron and nickel

被引：27
作者：
Volkers, Phillip I. [1 ]
Rauchfuss, Thomas B. [1 ]
Wilson, Scott R. [1 ]
机构：
[1] Univ Illinois, Dept Chem, Urbana, IL 61801 USA
来源：
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2006年 / 23期
关键词：
iron; nickel; S ligands; bridging ligands; coordination modes;
D O I：
10.1002/ejic.200600636
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The first transition-metal complexes bearing the natural product dihydroasparagusic acid, (HSCH2)(2)CHCO2H, as a ligand are reported. Various coordination modes and nuclearities are demonstrated for the chelating ligand by a series of iron and nickel complexes. Fe-2[(SCH2)(2)CHCO2H](CO)(6) retains carbonyl substitution reactivity typical of Fe2(SR)2(CO)6 complexes, yet carboxy coordination to Fe-I was unobserved. Coupling of the carboxylic acid with amines yields the corresponding amides Fe-2[(SCH2)(2)CHC(O)NHR](CO)(6) (R = Et, gly-O-tBu). Fe-2[(SCH2)(2)CHCO2H](CO)(4)(PMe3)(2) catalyzes H-2 production, but no better than unfunctionalized alkyl dithiolate analogs. Reactions of the ligand with NiCl2(dppe) afforded mono-, di-, and trinuclear complexes. Noteworthy is Ni-3[(SCH2)(2)CHCO2](2)(dppe)(2), which features an octahedrally coordinated Nirl center linked to a pair of square-planar Ni-II centers. (c) Wiley-VCH Verlag GmbH & Co.
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页码：4793 / 4799
页数：7
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