branched chain alkyl having 1 to 12 carbons cycloalkyl having 3 to 6 carbons alkenyl having 2 to 6 carbons and 1 or 2 double bonds alkynyl having 2 to 6 carbons and 1 or 2 triple bonds aryl preferably a carbocyclic aryl group having from 6 to 14 carbon atoms or a heterocyclic aryl group having from 2 to 14 carbon atoms and from 1 to 3 heteroatoms selected from the group consisting of nitrogen oxygen and sulfur halo e g fluoro or chloro c 1 to c 12 haloalkyl e g trifluoromethyl hydroxyl c 1 to c 12 alkoxy c 1 to c 12 alkylcarbonyl formyl oxycarbonyl carboxy c 1 to c 12 alkyl carboxylate c 1 to c 12 alkyl amide aminocarbonyl amino cyano diazo nitro thio sulfoxyl sulfonyl wherein r is co 2 h or po 3 h 2 and q is 0 or an integer of 1 to 5 and s is 0 or an integer from 1 to 3 r 5 is selected from the group consisting of hydrogen straight or branched chain alkyl having 1 to 12 carbons cycloalkyl having 3 to 6 carbons alkenyl having 2 to 6 carbons and 1 or 2 double bonds alkynyl having 2 to 6 carbons and 1 or 2 triple bonds aryl preferably a carbocyclic aryl group having from 6 to 14 carbon atoms or a heterocyclic aryl group having from 2 to 14 carbon atoms and from 1 to 3 heteroatoms selected.