Synthesis and complexing ability of N-[2-(2-morpholinoacetyl)hydrazinocarbothioyl]benzamide

The synthesis and identification of N-[2-(2-morpholinoacetyl)hydrazinocarbothioyl]benzamide were performed. A qualitative and quantitative evaluation of its complexing ability to the Ni(II) and Co(II) ions was done. The stability constants of the Ni- and Co-complexes were determined. The thermodynamic aspects of the complexing process were discussed.     

Complexing ability of poly[5-vinylsalicylidene-2-aminopyridine] towards different metal(II) salts

Mononuclear and binuclear complexes of poly (5-vinylsalicylidene-2-aminopyridine) ^a)were prepared with Copper(II), Cobalt (II), Nickel(II), Cadmium(II), dioxuranium(II) and Palladium(II) salts. The metal (II) acetates and palladium chloride gave mononuclear complexes, while cupric chloride gave a binuclear complex. The polymer complexes have been characterized on the basis of elemental analysis, u.v., i.r. and magnetic susceptibilty. The stereochemistry and the nature of the complexes are markedly dependent upon the mole ratio of the reactants and the anions. In all complexes the homopolymer was chelated to the metal ion via the nitrogen atom of the azomethine group and oxygen atom of the phenolic, group. The low value of the magnetic moment of binuclear copper complexes is due to the antiferromagnetic interaction between two adjacent copper atoms. The ligand field parameters are calculated and related to the electronic environments.     

新树型配体N,N′,N″-(三苯甲酰)-三乙氨基胺与镍的络合反应

1　引　　言树形分子是一类三维结构的新型有机配体 ,这类配体具有 2个或 2个以上可摆动的“臂”(饱和碳链 ) ,根据“臂”上所连的基团不同 ,可以与不同半径的金属离子配位 ,具有很高的选择性。三乙氨基胺类化合物是树型配体中的一类 ,该类配体与过渡金属离子形成的络合物可以作为选择性磁共振显影剂和超氧化物净氧剂。因而倍受化学研究者的关注。我们合成的新配体Ｎ ,Ｎ′,Ｎ″ (三苯甲酰 ) 三乙氨基胺 (ＴＢＯＡＡ) ,在显色剂二甲酚橙中 ,ｐＨ =3 .2～ 5 .8之间能与Ｎｉ2 + 形成橙红色络合物 ,其检测Ｎｉ2 + 下限达到 8.5× 1 0 - 8ｍｏ…     

Synthesis of N-[4-(2-naphthyl)]- and N-[4-(2-thienyl)methylaminobenzoyl]-dl-glutamic acids

N-[4-(2-Naphthyl)]-(IIa) and N-[4-(2-thienyl)methylaminobenzoyl]-dl-glutamic acids (IIb) have been synthesized for biological tests by the reaction of the corresponding halogen derivatives with diethyl p-aminobenzoyl-dl-glutamate (III) with subsequent hydrolysis of the esters obtained.     

Reactions of 2-pyrrole-[N-(o-hydroxyphenyl)aldimine] with metal ions

The Schiff-base 2-pyrrole-[N-(o-hydroxyphenyl)aldimine] has been synthesized by the condensation of 2-pyrrolecarboxaldehyde and o-aminophenol. Its reactions with several metal ions have been investigated. The Schiff-base behaved either as a bidentate monoaionic ligand with the pyrrole nitrogen intact and uninvolved in bonding to the metal, or as a tridentate dianion using the pyrrolate deprotonated nitrogen, the azomethine nitrogen and the phenolate oxygen in bonding. Thus complexes of Zn²⁺, Pb²⁺, Pd²⁺ and Pt²⁺ were synthesized with the ligand as a tridentate dianion; and complexes of Cu²⁺, Fe³⁺ and Co³⁺ were obtained with the Schiff-base behaving as a bidentate monoanion.     

新树型配体 TBOAA 与钴配合物的研究

研究了新配体N，N’，N”－（三苯甲酰）－三乙氨基胺（TOBAA）与二价钴离子生成配合物的光度特征和电化学特征。在较宽的pH范围内，新试剂和钴离子形成2：1的配合物，并且在一定范围内其吸光度与浓度具有良好的线性关系。     

Trimethylsilylcyanation of N-[3-(2-Furyl)-2-propenylidene]trifluoromethylanilines

The addition of Me₃SiCN to N-[3-(2-furyl)-2-propenylidene]trifluoromethylanilines, differing in the position of the CF₃ group in the benzene ring and in the presence or absence of a methyl group in the heterocycle, was studied in the presence of aluminum bromide as catalyst. The direction of the process (1,2-addition in all cases) was determined, and certain other features of the reactions were discovered. A series of the corresponding unsaturated heterocyclic -amino nitriles were synthesized. The molecular and crystal structures of one of them were determined by X-ray crystallographic analysis.