SYNTHESIS OF OPEN-CHAIN SCHIFF-BASE LIGAND 1,3-DI(PYRIDINE-2-CARBOXALDIMINO)PROPANE INCORPORATING NITROGEN-DONOR ATOMS AND CRYSTAL-STRUCTURES OF ITS CO-II, CU-II AND ZN-II COMPLEXES

The synthesis and structures of 1,3-di(pyridine-2-carboxaldimino)propa ne (C15H16N4, 1) and its cobalt(II) perchlorate (C15H20Cl2CoN4O10, 2), copper(II) perchlorate (C15H16Cl2CuN4O8, 3) and zinc(II) perchlorate (C15H16Cl2N4O8Zn, 4) complexes are described. Compound 1 was character ized by H-1-, C-13 NMR and mass spectrometry. The structures of the me tal complexes were determined by X-ray structure analysis. Crystal dat a: 2: triclinic, space group <P(1)over bar> (No. 2) a = 8.076(2) Angst rom, b = 10.129(2) Angstrom, c = 13.849(5) Angstrom, alpha = 80.11(2)d egrees, beta = 83.69(3)degrees, gamma = 80.46(2) Angstrom, V = 1100.3( 5) Angstrom 3, Z = 2; 3: monoclinic space group P2(1)/c (No. 14) a = 1 4.419(3) Angstrom, b = 7.118(3) Angstrom, c = 19.704(3) Angstrom, beta = 110.34(1)degrees, V = 1896.2(9) Angstrom(3), Z = 4; 4: triclinic, s pace group <P(1)over bar> (No. 2), a = 8.748(2) Angstrom, b = 9.169(2) Angstrom, c = 25.081(6) Angstrom, alpha = 82.13(2)degrees, beta = 83. 10(2)degrees, gamma = 75.56(2)degrees, V = 1922.1(8) Angstrom(3); Z = 4.