Patent ID: 6939969

Claim:
A tri- or bidentate amido ligand having the formula: wherein: R 1 is selected from the group consisting of hydrogen, hydrocarbyl, substituted hydrocarbyl, heteroatom-containing hydrocarbyl and substituted heteroatom-containing hydrocarbyl; X is selected from the group consisting of N and P; L is hydrocarbylene; n is 0 or 1; R 5 is selected from the group consisting of naphtahyl, pyridinyl, or quinolyl, which are optionally substituted with one or more alkyl, substituted alkyl, alkoxy, alkylsulfonyl, and amino moities; and R 2 , R 3 , and R 4 are independently selected from hydrogen and hydrocarbyl, or wherein R 2 and R 3 may be taken together to form a 5- or 6-membered ring structure selected from the group consisting of cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, and substituted heteroaryl, and wherein R 4 may be absent when R 2 and R 3 are taken together to form the 5- or 6-membered ring structure; with the proviso that when R 2 and R 3 are taken together to form a 6-membered unsubstituted aryl ring, R 1 and R 4 are H, and n is 0, then R 5 may not be a quinoline moiety connected at the C 8 position or an unsubstituted napthalene moiety when X is also N.