Patent ID: 7166732

Claim:
A copper precursor compound of the formula: wherein: (i) R 1 and R 2 may be the same as or different from one another and each is independently selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, and hydrocarbyl derivatives of silyl groups; R 3 is selected from the group consisting of C 3 -C 7 cycloalkyl, hydrocarbyl derivatives of silyl groups and NR 4 R 5 , where R 4 and R 5 may be the same as or different from one another and is independently selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, and hydrocarbyl derivatives of silyl groups; (ii) R 1 and R 2 may be the same as or different from one another and each is independently selected from the group consisting of C 3 -C 7 cycloalkyl and hydrocarbyl derivatives of silyl group; R 3 is selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, hydrocarbyl derivatives of silyl groups and NR 4 R 5 , where R 4 and R 5 may be the same as or different from one another and is independently selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, and hydrocarbyl derivatives of silyl groups; with the proviso that when R 1 and R 2 are trimethylsilyl, R 3 is not phenyl; (iii) R 1 and R 2 may be the same as or different from one another and each is independently selected from the group consisting of H and C 1 -C 6 alkyl; R 3 is selected from the group consisting of C 3 -C 7 cycloalkyl, aryl, hydrocarbyl derivatives of silyl groups and NR 4 R 5 , where R 4 and R 5 may be the same as or different from one another and is independently selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, and hydrocarbyl derivatives of silyl groups; (iv) R 1 and R 2 are both H: R 3 is selected from the group consisting of C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, hydrocarbyl derivatives of silyl groups and NR 4 R 5 , where R 4 and R 5 may be the same as or different from one another and is independently selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, and hydrocarbyl derivatives of silyl groups; (v) R 1 and R 2 are different from one another and each is independently selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, and hydrocarbyl derivatives of silyl groups; R 3 is selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, and hydrocarbyl derivatives of silyl groups and NR 4 R 5 , where R 4 and R 5 may be the same as or different from one another and is independently selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, and hydrocarbyl derivatives of silyl groups; and (vi) R 1 , R 2 are all isopropyl.