Synthesis, characterization and fungitoxicities of metal chelates of a pentadentate N3S2 ligand

Synthesis and Spectral Characterization of Some Transition Metal Complexes Containing Pentadentate SNNNS Donor Heterocyclic Schiff Base Ligands

“…The sulfhydryl m(SH) in the ligand appears at 2600 cm )1 , and remain unchanged even after complexation, suggesting its non-involvement in coordination [13]. The azomethine m(C@N) stretch observed at 1689 cm )1 in the ligand spectrum has shifted to lower wave number ($1624-1616 cm )1 ) in all the complexes, indicating coordination of azomethine nitrogen with the metal ions [14].…”

Synthesis, characterization and biological activities of 3-methylbenzyl 2-(6-methyl pyridin-2-ylmethylene)hydrazine carbodithioate and its transition metal complexes

“…These compounds possess a wide range of biological activities which vary when the structure of the complex is slightly changed by the introduction or removal of different functional groups [1][2][3][4][5][6][7][8][9].…”

Synthesis, 119Sn Mössbauer spectroscopic studies and X-ray crystal structure determination of new seven-coordinate diorganotin(IV) complexes with S,N,N,N,S-pentadentate Schiff bases derived from 2,6-diacetylpyridine of S-methyl- and S-benzyldithiocarbazates

“…Metal complexes of S,N,N,N,S-pentadentate Schiff base ligands derived from S-alkyldithiocarbazates comprise an important class of compounds because of their interesting physical chemistry properties [1,2] and potentially relevance in biological systems [3][4][5][6]. In this context, a number of 3d-metal complexes have been extensively studied by X-ray structural analysis and a number of other spectroscopic techniques [7,8].…”

“…So, this work allow us to calculate new working refined values for [alkyl]=)0.87 and [Ph]=)0.76 mm s )1 in seven coordinate complexes embodying S,N,N,N,S-pentadentate ligands using crystallographic data (h) and observed quadrupole splitting (D) values.Diorganotin(IV) acids (Aldrich) and analytical grade solvents were used as purchased. H 2 dapmdtc[3] and H 2 dapbdtc[2] were prepared as described previously. The complexes were synthesized by the following procedure: 0.21 mmol of the bis(dithiocarbazate) ligand was dissolved in 20 ml of MeOH under reflux; to this was added a 15 ml solution of 0.22 mmol of the appropriate organotin(IV) halide (Me 2 SnCl 2 , n Bu 2 SnCl 2 or Ph 2 SnCl 2 ).…”