| abstract |
Disclosed are compounds of formula V n n n where M is a metal atom; a metal compound; 2H whereby one H is bonded to each of the two nitrogen atoms depicted as being bonded to M (positions 29 and 31 shown) R 3 is H or methyl; R 1 and R 4 are independently selected from: H, C 1 to C 4 alkyl, C 2 to C 4 alkenyl, methoxy, butoxy, propoxy, NH 2 , NH—(C 1 to C 4 alkyl), N—(C 1 to C 4 alkyl) 2 , S—(C 1 to C 4 alkyl); R 8 to R 25 are the same or different and are independently selected from: C 1 to C 32 alkyl; C 2 to C 32 alkenyl; X—O—Y; X-phenyl, X 2 COOX 1 , X 2 CONR 1 R 11 , H; halide; where: X and X 2 are independently selected from: a chemical bond, —(CH 2 ) n — where n is an integer from 1 to 32, —(CH 2 ) a —CH═CH(CH 2 ) b where a and b are independently selected from integers 0-32 and a+b totals 32; X 1 and Y are independently selected from: C 1 to C 32 alkyl, C 2 to C 32 alkenyl, and H; R 1 and R 11 are independently selected from: H; C 1 to C 32 alkyl, C 2 to C 32 alkenyl, —(CH 2 ) n —; with the proviso that at least one of R 8 to R 25 is selected from: C 1 to C 32 alkyl, C 2 to C 32 alkenyl, X—O—Y, X-phenyl, X 2 COOX 1 , X 2 CONR 1 R 11 . |