Patent ID: 6034259
Filing Date: 2000-03-07
Classification: C08F,C08L,Y10S,Y10T

Abstract:
A compound of the formula ##STR93## wherein: R.sup.2 and R.sup.5 are each independently hydrocarbyl or substituted hydrocarbyl, provided that the carbon atom bound to the imino nitrogen atom has at least two carbon atoms bound to it;R.sup.3 and R.sup.4 are each independently hydrogen, hydrocarbyl, substituted hydrocarbyl, or R.sup.3 and R.sup.4 taken together are hydrocarbylene or substituted hydrocarbylene to form a carbocyclic ring;T.sup.1 is hydrogen, hydrocarbyl not containing olefinic or acetylenic bonds, R.sup.15 C(.dbd.O)-- or R.sup.15 OC(.dbd.O)--;Z is a neutral Lewis base wherein the donating atom is nitrogen, sulfur or oxygen, provided that if the donating atom is nitrogen then the pKa of the conjugate acid of that compound is less than about 6;X is a weakly coordinating anion; andR.sup.15 is hydrocarbyl not containing olefinic or acetylenic bonds;provided that when R.sup.3 and R.sup.4 taken together are hydrocarbylene to form a carbocyclic ring Z is not an organic nitrile.