Abstract
Spectroscopic and structural comparisons are made between a series of (OR)3Sn capped trinuclear nickel clusters. The synthesis of the (OEt)3Sn and (OPh)3Sn capped nickel clusters, [Ni3(dppm)3(μ3-Cl)(μ3-Sn(OEt)3)] (1), [Ni3(dppm)3(μ3-Cl)(μ3-Sn(OPh)3)] (2), was realized by the treatment of [Ni3(dppm)3(μ3-Cl)(μ3-SnCl3] with 6 eq. of KOEt or NaOPh, respectively. Treatment of complex 1 with 10 eq. glycerol results in the synthesis of the (C3H5O3)Sn capped trinuclear nickel cluster, [Ni3(dppm)3(μ3-Cl)(μ3-Sn(C3H5O3))] (3). The crystallographic studies of these clusters allow a detailed structural comparison. In addition, cyclic voltammetric data were obtained for complexes 1, 2, and 3 and their electrochemical properties are compared. Complex 1 and 3 exhibit reversible oxidation and reduction events. Complex 2 displays a reversible oxidation and a pseudo-reversible reduction.
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