Syntheses of new sulfur-nitrogen palladacycles -: Crystal structures of [(AMTTO)PaBr2]2•3.5THF, [(AMTTO)PdI2]2•3MeOH, [(AMTTO)Pd(PPh3)Br]Br•MeOH, and [(AMTTO)Pd(PPh3)I]•2MeOH (AMTTO=4-amino-6-methyl-1,2,4-triazine-3-thione-5-one)

Reactions of [(AMTTO)PdCl2]. MeOH (1) with sodium bromide and sodium iodide led to the palladacycles [(AMTTO)PdBr2](2). 3. STHF (2) and [(AMTTO)PdI2](2). 3MeOH (3) in excellent yields. Treatment of 2 and 3 with triphenylphosphane gave the complexes [(AMTTO)Pd(PPh3)Br]-Br . MeOH (4) and [(AMTTO)Pd(PPh3)I]. 2MeOH (5), respectively. All the complexes have been characterized by IR spectroscopy, elemental analysis, as well as by X-ray diffraction studies. In addition, 4 and 5 have been characterized by P-31 NMR spectroscopy. Crystal data for 2 at -80 degrees C: triclinic, space group P (1) over bar, a = 1150.8(1), b = 1234.1(1), c = 1398.1(1) pm, alpha = 84.01(1)degrees, beta = 86.84(1)degrees, gamma = 66.40(1)degrees, Z = 2, R-1 = 0.0366; for 3 at -50 degrees C: orthorhombic, space group Pbcn, a = 1476.2(1), b = 1333.1(1), c = 1440.1(1) pm, Z = 4, R-1 = 0.0302; for 4 at -80 degrees C: monoclinic, space group P2(1)/c, a = 993.0(1), b = 993.6(1), c = 2735.5(2) pm, beta = 97.64(1)degrees, Z = 4, R-1 = 0.0464; for 5 at -70 degrees C: monoclinic, space group P2(1)/c, a = 865.7(2), b = 3760.5(3), c = 861.1(1) pm, beta = 97.56(1)degrees, Z = 4, R-1 = 0.0613.