Importance of co-donor field strength in the preparation of tetradentate α-diimine nickel hydrosilylation catalysts
作者:Tyler M. Porter、Gabriel B. Hall、Thomas L. Groy、Ryan J. Trovitch
DOI:10.1039/c3dt52419a
日期:——
Although bis(α-diimine)Ni complexes were prepared when amine-substituted chelates were added to Ni(COD)2, the incorporation of strong-field phosphine donors allowed the isolation of (κ4-N,N,P,P-DI)Ni hydrosilylation catalysts. The crystallographic investigation of two different (κ4-N,N,P,P-DI)Ni compounds revealed that the geometry about nickel influences the observed degree of α-diimine reduction.
尽管在加入胺取代的螯合剂到Ni(COD)2中时制备了双(α-二亚胺)Ni配合物,但引入强场磷配体供体使得能够分离出(κ4-N,N,P,P-二配体)Ni氢硅烷化催化剂。对两种不同的(κ4-N,N,P,P-二配体)Ni化合物的晶体学研究表明,镍周围的结构对观察到的α-二亚胺还原程度有影响。