Study of the bonding properties of the new ligands C5H3N(2-R')(6-CH2PPhR) toward rhodium(I). Evidence for a dynamic competition for bonding between O- and N-donor centers when R=o-anisyl, R'=Me

被引：87

作者：

Yang, H ^{[1
]}

Lugan, N ^{[1
]}

Mathieu, R ^{[1
]}

机构：

[1] CNRS,CHIM COORDINAT LAB,UPR 8241,F-31077 TOULOUSE 04,FRANCE

来源：

ORGANOMETALLICS | 1997年 / 16卷 / 10期

关键词：

D O I：

10.1021/om960982+

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The bonding properties of the optically active chiral-at-P polydentate ligands C5H3N(2-R')(6-CH2PPhR) (R = Me, R' = H, Me; R o-anisyl, R' = H, Me) and the achiral ligand C5H3N(2-Me)(6-CH2PPh2) toward (COD)Rh+ are reported. The results show that steric hindrance of the 2-position of the pyridyl ring induces a labile character of the Rh-N bond. Moreover, for R = o-anisyl and R' = Me, a dynamic competition for bonding between the N-and O-donating centers is observed. Comparison of the solid state structures of complexes [Rh(COD)(C5H4N(2-CH2PPhMe)][BF4] and [Rh(COD)(C5H3N(2-Me)(6-CH2PPh2)][BF4] shows a significant bond lengthening of the Rh-N bond in the latter complex, consistent with its fluxional behavior observed in solution.

引用

页码：2089 / 2095

页数：7

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