Crystal Structures of the 1,2-Dihydroquinazolinium-4-yl Pd(II) Complexes [PdI{C=N(Xy)CH(R)NHC6H4-2}(CNXy)2]OTf (R = Me, CH = CH2, C6H4Me-4) and of the 2-Iminoaryl Pd(II) Complex [PdI(C6H4{N=C(H)C6H4Me-4}-2)(2,2'-bipyridine)]

The crystal structures of trans-[PdI{C=N(Xy)CH(R)NHC6H4-2}(CNXy)(2)]OTf (R = Me (1 center dot CHCl3) space group P-1, a = 8.7665(4) , b = 15.5346(8) , c = 16.2415(8) , alpha = 72.698(2)A(0), beta A = 78.310(3)A(0), gamma A = 88.310(2)A(0), CH = CH2 (2 center dot 0.5Et(2)O) space group P2(1)/c, a = 15.7868(6) , b = 14.5066(6) , c = 18.5814(7) , beta = 106.707(2)A(0), C6H4Me-4 (Tol) (3) space group P-1, a = 11.96075(5) , b = 12.9452(51) , c = 13.1263(5) , alpha = 93.306A(0), beta A = 95.822(2)A(0), gamma A = 94.572(2)A(0)) have been measured. The structural data suggest the existence of some electron delocalization over the heterocyclic ring, the extension of which seems to depend on the R substituent. The complex [PdI{C6H4(N=CHTol)-2}(bpy)] (Tol = C6H4Me-4, bpy = 2,2'-bipyridine, 4) is the fourth imino-substituted aryl palladium complex. Complex 4 crystallizes in triclinic P-1 with a = 8.7873(5) , b = 8.8936(5) , c = 13.8375(8) , alpha = 90.116(2)A(0), beta A = 92.760(2)A(0), gamma A = 106.243(2)A(0).