Construction of a new versatile hydrazonic ligand and its chemical and structural behaviour towards metal ions

The synthesis of a new hydrazonic ligand, 2,6-diacetylpyridine bis[2-(semicarbazono) propionylhydrazone](H4L), is reported together with the synthesis, X-ray structure analysis and the IR spectroscopic characterisation of the complexes [{Ni2(H2L)(OH2)Cl}2Cl2]·2dmf·5H2O 1(dmf = dimethylformamide), [Co(H4L)(OH2)2][NO3]2·2H2O 2 and [Zn(H3L′)(OH2)2][ClO4]2·1.5H2O 3[H3L′= 2,6-diacetylpyridine semicarbazone 2-(semicarbazono) propionylhydrazone]. The interest of these structures pertains mainly to the cations. In 1 a tetranuclear complex is present with two nonequivalent nickel atoms, both of which exhibit distorted-octahedral co-ordination, and with the hydrazone acting as enneadentate donor. The structures of 2 and 3 consist of monomeric units in which the metal atom has a pentagonal-bipyramidal environment with two axial H2O molecules and the hydrazone ligand forming the basal plane.

[1]  C. Pelizzi,et al.  Preparation and x-ray crystal structure of a seven-coordinate cobalt(II) complex with 2,6-diacetylpyridine bis(2-picolinoylhydrazone) , 1986 .

[2]  O. Kahn.  Dinuclear Complexes with Predictable Magnetic Properties , 1985 .

[3]  Vinod K. Gupta,et al.  Multidentate ligands containing 2,2'-bipyridine and/or pyridine moieties: structural aspects of their octahedral and pentagonal-bipyramidal complexes , 1984 .

[4]  D. I. Stuart,et al.  An empirical method for correcting diffractometer data for absorption effects , 1983 .

[5]  C. Landee,et al.  Structure and magnetic properties of the ferromagnetically coupled nickel dimer (C3H6N2H6)2[Ni2Cl8(H2O)2] , 1981 .

[6]  E. M. Holt,et al.  Transition-metal–crown-ether complexes. III. Seven-coordinate CoII in dinitratocobalt(II)–12-crown-4 and diaquacobalt(II) dinitrate–15-crown-5 , 1981 .

[7]  A. Clearfield,et al.  Effects of larger chelate rings on the geometry and properties of copper(II) complexes. Crystal and molecular structure and spectral properties of aquo(1,1-difluoro-4,5,12,13-tetramethyl-1-bora-3,6,11,14-tetraaza-2,15-dioxacyclopentadeca-3,5,11,13-tetraenato)copper(II) perchlorate , 1981 .

[8]  A. K. Sarkar,et al.  A study of some transition metal complexes of salicylidene 2-picoloyl hydrazone Schiff base and related ligands , 1981 .

[9]  L. Hanton,et al.  Diaqua(7,l5-dihydro-7,9,13,15-tetramethylpyrido[2',1',6':12,13,14][1,2,4,7,9,10,13]heptaazacyclopentadeca[3,4,5,6,7,8-aklmn][1,10]phenanthroline)cobalt(II) bis(tetrafluoroborate) [Co(H2O)2(tdmmb)][BF4]2 , 1980 .

[10]  C. O'connor,et al.  Structural and magnetic properties of dimeric di-.mu.-chloro-tetrakis(ethylenediamine)dinickel(II) chloride , 1979 .

[11]  G. J. Palenik,et al.  Pentagonal-bipyramidal complexes. Crystal and molecular structures of chloroaqua(2,6-diacetylpyridine bis(semicarbazone))manganese(II), -iron(II), -cobalt(II), and -zinc(II) chloride dihydrates , 1978 .

[12]  G. J. Palenik,et al.  Binuclear complexes. Synthesis and characterization of the binuclear ligand 1,4-dihydrazinophthalazine bis(2'-pyridinecarboxaldimine) and the nickel complex .mu.-Chloro-tetraaqua[1,4-dihydrazinophthlazine bis(2'-pyridinecarboxaldimine)]dinickel(II) chloride dihydrate , 1977 .

[13]  M. F. Iskander,et al.  Coordination compounds of hydrazine derivatives with transition metals. XIV. Nickel(II) chelates with bidentate aroylhydrazones and their reactions with heterocyclic bases , 1977 .

[14]  G. J. Palenik,et al.  Pentagonal-bipyramidal complexes. Synthesis and characterization of cobalt(II) and zinc(II) complexes of neutral and dianionic 2,6-diacetylpyridinebis(2'-pyridylhydrazone) , 1976 .

[15]  A. Hefny,et al.  Coordination compounds of hydrazine derivatives with transition metals—XII Nickel(II) and copper(II) chelates of bis(n-salicylidene)dicarboxylic acid dihydrazides , 1976 .

[16]  N. S. Biradar,et al.  Dimeric square planar complexes of Cu(II) with aroyl hydrazones , 1976 .

[17]  M. F. Amira,et al.  Coordination compounds of hydrazine derivatives with transition metals—IX: The reaction of l-phenylsemicarbazide with copper(II) salts☆ , 1976 .

[18]  G. J. Palenik,et al.  Pentagonal bipyramidal complexes of nickel(II) and copper(II). Relative importance of ligand geometry vs. crystal field effects , 1974 .

[19]  M. S. Lehmann,et al.  A method for location of the peaks in step‐scan measured Bragg reflexions , 1974 .

[20]  H. D. Sharma,et al.  Moessbauer spectra of methyltin(IV) nitrates and their adducts , 1974 .

[21]  B. S. Ramaswamy,et al.  Infrared Combination Frequencies in Coordination Complexes containing Nitrate Groups in various Coordination Environments. A Probe for the Metal–Nitrate Interaction , 1971 .