Investigation of the monomer-dimer equilibria of molybdocenes in water

被引：45

作者：

Balzarek, C

Weakley, TJR

Kuo, LY ^{[1
]}

Tyler, DR

机构：

[1] Univ Oregon, Dept Chem, Eugene, OR 97403 USA

[2] Lewis & Clark Coll, Portland, OR 97219 USA

来源：

ORGANOMETALLICS | 2000年 / 19卷 / 15期

关键词：

D O I：

10.1021/om000180l

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Molybdocenes form monomeric and dimeric complexes upon dissolution in water. The solution structures of the molybdocenes at neutral pH are inferred as the monomeric [(CpR)(2)Mo(OH2)(OH)](+) and the dimeric [(CpR)(2)Mo(mu-OH)(2)Mo(CpR)(2)](2+). The equilibrium constants for the monomer-dimer equilibria were obtained from H-1 NMR dilution studies as K'(eq) = (7.9 x 10(-2)) +/- (1.0 x 10(-3)) M for R = CH3 at pD 7 and as K-eq = (3.5 x 10-2) +/- (1.3 x 10(-3)) M for R = CH3 at pD 3.5. Qualitatively, the monomer of the CpMe molybdocene is more favored than the Cp analogue, compared to their respective dimers.

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页码：2927 / 2931

页数：5

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