排序方式: 共有28条查询结果,搜索用时 15 毫秒
21.
22.
23.
Beloglazkina E. K. Moiseeva A. A. Chizhevskii A. A. Tarasevich B. N. Zyk N. V. Butin K. P. 《Russian Chemical Bulletin》2003,52(9):1990-2004
The following two groups of nickel(ii) diiminodithiolate and diiminodisulfide N2S2-complexes were synthesized for the first time: (1) complexes with complete conjugation between all four donor centers, viz., compounds with non-innocent ligands, and (2) complexes containing a short conjugation system involving only two imino groups of the ligand. The complexes were studied by 1H NMR, ESR, and UV spectroscopy, mass spectrometry, and electrochemistry. Solutions of glyoxal bis(2-mercaptoanil)nickel(ii) in DMF showed an ESR signal, which decreased with time, the processes being accompanied by an analogous change in the intensity of the absorption band at 931 nm. The electrochemical properties of this complex also change with time. The results of studies demonstrated that compounds with non-innocent ligands of this type were initially generated as classical diiminodithiolate structures, which were transformed into the ortho-iminothiosemiquinonate biradicals and then into oligomeric complexes both in solution (fast transformation) and in the solid state (slow transformation). Oligomeric structures of these compounds are stable for a long period of time. 相似文献
24.
I. T. Chizhevskii A. A. Koridze P. V. Petrovskii N. E. Kolobova 《Russian Chemical Bulletin》1981,30(5):884-886
Conclusions New rhodium complexes, derivatives of Rh(
4-C7H8)(acac) and Rh(
4-C7H8)(
5-C5H5) with functional groups in the norbornadiene ligand, have been synthesized.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1124–1127, May, 1981. 相似文献
25.
K. P. Butin A. A. Moiseeva E. K. Beloglazkina Yu. B. Chudinov A. A. Chizhevskii A. V. Mironov B. N. Tarasevich A. V. Lalov N. V. Zyk 《Russian Chemical Bulletin》2005,54(1):173-188
N,N’-Polymethylenebis(thiosalicylidene)iminate and macrocyclic dithiadiazadibenzocycloalkadiene complexes of nickel(II) were synthesized and their electrochemical and spectroscopic properties were studied. Dithiadiazadibenzocycloalkadiene complexes containing two DMSO molecules coordinated to Ni2+ and two outer-sphere ClO4
− anions were synthesized by the reaction of the corresponding macrocyclic ligands with Ni(ClO4)2·6H2O. The structure of 3,6-dithia-10,14-diazadibenzo[a,g]cyclopentadeca-9,14-dienylnickel(II)[bis(dimethyl sulfoxide) bis-perchlorate] was established by X-ray diffraction. The UV-Vis spectroscopic data are consistent with octahedral structures of diiminobis(sulfide) complexes, a square-planar structure of the thiosalen complex, and distorted tetrahedral structures of other diiminodithiolate complexes. The reaction of S-tert-butylthiosalicylaldehyde with hydrazine hydrate afforded di(ortho-tert-butylthiobenzal)azine. The reaction of the latter with anhydrous NiCl2 produced a colored complex with the simplest molecular formula Ni(C16H12N2S2) in 15% yield. Semiempirical PM3(tm) calculations and the results of UV-Vis, ESR, and 1H NMR spectroscopy demonstrate that this complex has most probably a dimeric structure, in which two Ni centers adopt a nearly square-planar configuration. The complexes are clearly divided into two types according to their electrochemical behavior in DMF solutions. The type 1 is characterized by reversibility of the first reduction steps. The type 2 is characterized by irreversible two-electron reduction as the first step accompanied by deposition of Ni metal on the electrode surface. Rapid electrochemically initiated alkylation occurs in the presence of various alkylating agents (BunI, BunBr, (DmgH)2CoCH3) in a solution of complex 1 in DMF.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 169–183, January, 2005. 相似文献
26.
27.
28.