Synthesis and Characterization of Novel Double Tetrahedral Transition Metal Clusters

Abstract

Abstract: The reaction of Co₂(CO)₈ and [C₁₃CC(O)OCH₂]₂ gave a novel double tetrahedral cluster compound([(CO)₉Co₃(μ₃-C)C(O)OCH₂]₂ 1)containing two tetrahedral skeletons(Co₃C) linked by a C(O)OCH₂CH₂OC(O) bridge. The reaction of 1 with different molecular ratios of Na[M(CO)₃C₅H₄R][M=Mo, W; R=H, C(O)Me] gave the one-step exchange products (CO)₉Co₃(μ₃-C)C(O)OCH₂CH₂OC(O)(μ₃-C)Co₂M(CO)₈(C₅H₄R)[M=Mo, R=H(2); M=Mo, R=C(O)Me (3); M=W, R=H (4); M=W, R=C(O)Me (5)] or the two-step exchange products or the two-step exchange products [(C₅H₄R)(CO)₈Co₂M(μ₃-C)C(O)OCH₂]₂[M=Mo, R=H(6); M=Mo, R=C(O)Me (7); M=W, R=H (8); M=W, R=C(O)Me (9)]. By treating. By treating₅ or 9 with Na[Mo(CO)₃C₅H₅] in 1/2 molecular ratio, the compound (C₅H₅)(CO)₈Co₂Mo(μ₃-C)·C(O)OCH₂CH₂OC(O)(μ₃-C)CoMoW(CO)₇(C₅H₄C(O)Me)(C₅H₅)(10) or [(C₅H₅)(C₅H₄·C(O)Me)(CO)₇CoMoW(μ₃-C)C(O)OCH₂]₂ (11) which has one or two chiral tetrahedral skeletons(CoMoWC)was obtained. Compounds 1_11 were characterized by C/Hanalyses, IRand ¹HNMR. The results indicate that the Co(CO)₃1/n (#14) and lattice parameters, a=0.9330(2) nm, b=1.5197(4) nm, c=1.1783(4) nm, β=91.16(2)°, Z=2, F (000)=972.

Key words: Synthesis, Crystal structure, Double tetrahedral cluster, Metal exchange reaction

CLC Number:

O641

TrendMD:

ZHANG Jie, CHEN Xue-Nian, DING Er-Run, YIN Yuan-Qi, SUN Jie . Synthesis and Characterization of Novel Double Tetrahedral Transition Metal Clusters[J]. Chem. J. Chinese Universities, 1999, 20(8): 1172.

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Synthesis and Characterization of Novel Double Tetrahedral Transition Metal Clusters

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