Cationic iridium(I) complexes as catalysts for the alcoholysis of silanes

Cationic iridium(I) complexes as catalysts for the alcoholysis of silanes
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DOI:
10.1021/om020938w
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发表时间:
2003-06-09
期刊:
影响因子:
2.8
通讯作者:
Hambley, TW
Hambley, TW
中科院分区:
化学2区
文献类型:
--
作者:
Field, LD;Messerle, BA;Hambley, TW

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合成了五种含双齿配体的阳离子铱配合物,(1-吡唑基)甲烷(BPM)和双(3,5-二甲基-1-吡唑基)甲烷(dmBPM),{[Ir(BPM)-(COD)](+)(BPh 4)(-)}(1),{[Ir(dmBPM)(COD)](+)(BPh 4)(-)}(2),{[Ir(BPM)(COD)](+)[Ir(COD)Cl-2](-)}(4),报道了{[Ir(BPM)(CO)(2)](+)(BPh 4)(-)}(3)和{[Ir(dmBPM)(CO)(2)](+)(BPh 4)(-)}(5)。通过核磁共振谱对配合物进行了表征,并通过单晶X射线衍射分析确定了配合物{[Ir(BPM)(CO)(2)](+)(BPh 4)(-)}(3)的固态结构。配合物{[Ir(BPM)(CO)(2)](+)(BPh 4)(-)}(3)和{[Ir(dmBPM)(CO)(2)](+)(BPh 4)(-)}(5)是在温和条件下醇解一系列醇和氢硅烷(包括仲和叔氢硅烷)的有效催化剂。
The syntheses of five cationic iridium(l) complexes, containing the bidentate ligands bis-(1-pyrazolyl)methane (BPM) and bis(3,5-dimethyl-1-pyrazolyl)methane (dmBPM), {[Ir(BPM)-(COD)](+)(BPh4)(-)} (1), {[Ir(dmBPM)(COD)](+)(BPh4)(-)} (2), {[Ir(BPM)(COD)](+)[Ir(COD)Cl-2](-)} (4), {[Ir(BPM)(CO)(2)](+)(BPh4)(-)} (3), and {[Ir(dmBPM)(CO)(2)](+)(BPh4)(-)} (5), are reported. The complexes were characterized by NMR spectroscopy, and the solid-state structure of {[Ir(BPM)(CO)(2)](+)(BPh4)(-)} (3) was determined by single-crystal X-ray crystallographic analysis. The complexes {[Ir(BPM)(CO)(2)](+)(BPh4)(-)} (3) and {[Ir(dmBPM)(CO)(2)](+)(BPh4)(-)} (5) are effective catalysts for the alcoholysis of a range of alcohols and hydrosilanes, including secondary and tertiary hydrosilanes, under mild conditions.