The grafting of [Mo(N)(NR2)(OR)2(pyr)] (R = SiMe3, pyr = pyridine) onto highly dehydroxylated silica proceeds to the formation of well-defined silica-supported species. Whereas the molecular precursor is inactive towards alkyne metathesis, its immobilized counterpart displays high activity, which can be significantly enhanced by the addition of 2 equivalents of B(C6F5)3.
[Mo(N)(NR2)(OR)2(pyr)](R = SiMe3,pyr =
吡啶)接枝到高度脱羟基的
二氧化硅上,形成明确的
二氧化硅负载物质。虽然分子前体对炔复分解反应没有活性,但其固定化对应物却表现出高活性,通过添加 2 当量的 B(
C6F5)3 可以显着增强活性。