| 主权项 |
1. A compound of formula IIwherein
A is optionally substituted phenyl or optionally substituted pyridinyl; D is optionally substituted phenyl or optionally substituted pyridinyl; is a delocalized bond; R1and R2 are each independently selected from hydrogen, halogen, an optionally substituted (C1-C20) hydrocarbon, —C(═O)—R10, —C(═O)NR10R11, —C(═O)OR10, —C(═S)NR10R11, —C(═S)—R10 and —C(═S)OR10; or R1 and R2, together with the carbons to which they are attached, may be an optionally substituted non-aromatic ring; R10 and R11 are each selected independently from hydrogen, an optionally substituted (C1-C20) hydrocarbon and a polar, neutral moeity; represents a coordinate covalent bond to a metal; and M is a metal that forms additional bonds to A and D;with the proviso that, when two azaallyl moieties are present, A and D are both unsubstituted pyridinyl, and R1 and R2 are both hydrogen, the metal cannot be zinc, iron, cobalt, or nickel. |
