Synthesis and Spectroscopic Characterization of New [Cu(^{tBu}salpphen)]_2, [MoCl_2(salpphen)]_2 Complexes and Sn_2Cl_8(^{tBu}salpphen).2HNEt_3 Adduct


Abstract: Tetradentate Schiff base ligands, which were derived from the condensation of phenylenediamine with salicylaldehyde [salpphenH_2: N, N'-p-phenylene-bis(salicyclideneimine)] or 3,5-di-tert-butyl-2-hydroxyben- zaldehyde [^{tBu}salpphenH_2: N, N'-p-phenylene-bis(3,5-di-tert-butylsalicylidene)] and their complexes of Cu(II), Mo(IV) and adduct of Sn(IV) were synthesized and characterized by ^1H-NMR, ^{13}C-NMR, and IR spectroscopic methods, mp, elemental analysis, and magnetic susceptibility. According to these data probable structures were assigned to these complexes and adduct. These are of the formula [Cu(^{tBu}salpphen)]_2 and [MoCl_2(salpphen)]_2, and Sn_2Cl_8(^{tBu}salpphen).2HNEt_3. [Cu(^{tBu}salpphen)]_2 was prepared by the reaction of the metal salt with the ^{tBu}salpphenH_2 Schiff base ligand in EtOH. [MoCl_2(salpphen)]_2 was synthesized by reactions of [MoCl_4(CH_3CN)_2] with the salpphenH_2 Schiff base ligand in THF. The Schiff base adduct Sn_2Cl_8(^{tBu}salpphen).2HNEt_3 was synthesized by the reaction of SnCl_4 with the ^{tBu}SalpphenH_2 Schiff base ligand in the presence of NEt_3 in toluene.

Keywords: Copper(II) complex, molybdenum(IV) complex, Schiff base complexes, tin(IV) adduct, tetradentate Schiff base ligands

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