NJ(Pt,H) and Pt.cntdot..cntdot..cntdot.H-C interactions in Schiff base complexes of 2-(benzylideneamino)-3-methylpyridine. Molecular structures of dichloro(2-((2,4,6-trimethylbenzylidene)amino)-3-methylpyridine)(triethylarsine)platinum(II) and dichloro(2-amino-3-methylpyridine)(triethylphosphine)palladium(II)

The preparation and characterization of the complexes trans-PtCl2 (2-(N=CHR)-3-CH3CSH3NJ(AsEt3) and trans-PdCI2(2- (N=CHR)-3-CH,C5H3N)(PEt3) (R = a substituted aryl group) are reported. The molecular structures of trans-PtCI2(2-(N= CH(mesity1))-3-methyIpyridine)(AsEt3) and trans-PdCl2(2-amino-3-methylpyridine)(PEt3) have been determined by X-ray analysis. The former reveals a relatively short imine proton-platinum separation of 2.43 (8) A, which is confirmed in solution by the observation of a proton-platinum coupling constant. Despite this spin-spin coupling and the proximity of the proton to the metal, this interaction is considere: to be weak. Crystal data for the Pt complex are as follows: a = 8.177 (2) A, 6 = 10.832 (I) A, c = 14.370 (2) A; o( = 82.99 (2)O, p = 81.29 (2)’, y = 89.41 (2)’; V = 1248.7 (8) A’; space group = Pi, Z = 2. Crystal data for the Pd complex are as follows: a = 13.866 (I) A, b = 7.597 (1) A, c = 16.555 (1) A; @ = 101.971’; V= 1705.96 (6) A’; space group = Cc, Z = 4. IH, ”C, and 31P NMR data are reported for the complexes.