Patent ID: 7816549

Claim:
A compound represented by the general formula (1) wherein M represents a Group 4 atom, an aluminum atom, a gallium atom or an indium atom; when M is a Group 4 atom, n is 3, and when M is an aluminum atom, a gallium atom or an indium atom, n is 2; R 1 and R 3 each independently represent an alkyl group having from 1 to 6 carbon atoms which may be substituted with a fluorine atom, or a trialkylsilyl group represented by R 6 R 7 R 8 Si; R 6 , R 7 and R 8 each independently represent an alkyl group having from 1 to 4 carbon atoms; R 2 represents a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms which may be substituted with a fluorine atom; R 2 and R 3 may be combined to form a ring, and R 4 and R 5 each independently represent an alkyl group having from 1 to 4 carbon atoms which may be substituted with a fluorine atom.