作者机构：
Department of Chemistry, Central China Normal University, Wuhan, People's Republic of China
通讯机构：
[ZHAN, CG] C;CENT CHINA NORMAL UNIV,DEPT CHEM,WUHAN,PEOPLES R CHINA.
摘要：
A demonstration of Pauling's pair-defect-sum approximation from the maximum overlap method is presented. It is based on the generalized formula of the bond strength that we obtained for the hybridization of atomic orbitals for systems containing more than 2 ligands. This work indicates that the pair-defect-sum approximation is a reasonable result of the generalized formula, but the expansion terms with its higher power are omitted.
期刊：
Inorganic and Nano-Metal Chemistry,1990年20(3):335-344 ISSN：2470-1556
通讯作者：
WU, ZS
作者机构：
[WU, ZS; GUI, ZQ; YEN, ZH] Department of Chemistry , Huazhong Normal University , Wuhan, Hubei P. R. China
通讯机构：
[WU, ZS] H;HUAZHONG NORMAL UNIV,DEPT CHEM,WUHAN,PEOPLES R CHINA.
摘要：
Abstract A new series of copper(II), zinc(II), nickel(II) and cobalt(II) complexes with the Schiff base derived from 4-hydroxysalicylaldehyde and L-alanine has been synthesized. These compounds have been characterized by elemental analyses, thermoanalyses, conductivity measurements, infrared and electronic spectra. The Schiff base ligand and its zinc(II) complex have been further identified by 1H NMR. The results suggest that the Schiff base acts as a tridentate ligand and the metal ions in the complexes are bonded to the ligand through the phenolic oxygen, imino nitrogen and carboxylate oxygen. All complexes are non-electrolytes. The complexes, except for the cobalt(II) complex, have been found to possess anticancer activity against Ehrlich ascites carcinoma with the copper(II) complex having the highest anticancer activity by the primary screening tests.
作者机构：
[LIU, ZJ; CHEN, WB] Institute of Organic Synthesis, Central China Normal University , Wuhan, People's Republic of China
通讯机构：
[LIU, ZJ] C;CENT CHINA NORMAL UNIV,INST ORGAN SYNTHESIS,WUHAN,PEOPLES R CHINA.
摘要：
Abstract Ten title compounds 2a-j were synthesized by utilising mercuric (I) catalyzed thiono-thiolo rearrangement of O-propargyl-O-alkyl-pho-sphoramidothionates (1a-j) in HAc-NaAc buffer (PH=3.6). The yield of compounds 2a-e and 2f-j is 58–67% and 12–41%. This is the example of [3,3]-sigmatropic type rearrangement of 1,5-enyne system in thionop hosphoramidate chemistry.
作者机构：
[张友杰; 王可玉; Philip N Borer; George C.Levy] 华中师范大学分析测试中心;[张友杰; 王可玉; Philip N Borer; George C.Levy] NMR and Data Processing Laboratory,Syracuse University,Syracuse.NY,13244-4100 USA
期刊：
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS,1990年51(1-4):286 ISSN：1042-6507
作者机构：
[Wenfang Huang; Xiaoru Chen; Min Fan] Institute of Organic Synthesis, Central China Normal University, Wuchang Hubei, P.R.C.
摘要：
Abstract The phase transfer catalyzed (PTC) Wittig reaction has the advantage of not requiring additional catalyst due to the catalytic property of phosphonium salt itself. This report presents the studies on such a reaction of diphenyl-, di-alkyl- and methyl-2-butenyl phosphonium ylids which are produced in situ from the corresponding phosphonium salts.
作者机构：
[ZHU, J; ZHANG, YJ; HUANG, WF] CENT CHINA NORMAL UNIV,INST ORGAN SYNTHESIS,WUHAN,PEOPLES R CHINA.;[ZHANG, YJ] CENT CHINA NORMAL UNIV,DEPT CHEM,WUHAN,PEOPLES R CHINA.
通讯机构：
[ZHANG, YJ] C;CENT CHINA NORMAL UNIV,DEPT CHEM,WUHAN,PEOPLES R CHINA.
期刊：
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS,1990年51(1-4):271 ISSN：1042-6507
作者机构：
[Jing-Lin Zhang; Shi Zhi Chen] Institute of Organic Synthesis, Huazhong Normal University , Wuhan , Hubei , P.R.C.
摘要：
Abstract Reports [1-5] concerning the preparation of benzo-1,3,2-benzoxazaphosphonaline containing a substituent on nitrogen have been published. The synthesis of parent compund, 1,2-dinydro-1,3,2-benzoxazaphosphorine, has not been reported. We found that it can be easily synthesized pY the reaction of salicylic aldehyde with O-alkyl-phosphoryl dichlorides and ammonia.
期刊：
Computational and Theoretical Chemistry,1990年205:267-277 ISSN：2210-271X
作者机构：
[ZHENG, F; ZHAN, CG] CENT CHINA NORMAL UNIV, DEPT CHEM, WUHAN, PEOPLES R CHINA.
摘要：
A new formula for calculating bond energy has been suggested in order to improve the iterative maximum overlap approximation method and to describe clearly the physical picture determining molecular geometry according to the principle of hybridization. By use of this formula, one can directly work out the equilibrium internuclear distances on the condition that the sum of bond energies in a molecule is maximum. The improved method has been examined by being applied to some alkanes and silanes, the agreement with experimental results indicates that the idea stated in this paper is reasonable.
期刊：
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS,1990年51(1-4):309 ISSN：1042-6507
通讯作者：
Zhang, J.-L.
作者机构：
[Jing-Lin Zhang; And Jin-Qiao Lu] Institute of Organic Synthesis, Huazhong Normal University , Wuhan , Hubei , P.R.C.
通讯机构：
Institute of Organic Synthesis, Huazhong Normal University, China
摘要：
Abstract 2-(N2-O,O-Dialkylthiophosphoryl)hydrazinobenzothiazole (I) could be synthesized with satisfactory yields from the reaction of 2-hydrazinobenzothiazole with thiophosphoryl chlorides. At higher temperature bis(dialkoxy)thiophosphoryl derivatives (11) were given.
作者机构：
[ZHAN, CG; WANG, QL; ZHENG, F] Department of Chemistry, Central China Normal University, Wuhan, People's Republic of China
通讯机构：
[ZHAN, CG] C;CENT CHINA NORMAL UNIV,DEPT CHEM,WUHAN 430070,PEOPLES R CHINA.
关键词：
Bond order;Maximum bond order;Maximum bond order principle;Maximum overlap method
摘要：
Based on the maximum overlap method, an alternative scheme for the calculation of the maximum bond order defined by Jug is introduced to simplify the calculation procedure.
期刊：
Journal of Molecular Structure: THEOCHEM,1990年205:151-157 ISSN：0166-1280
通讯作者：
HU, ZM
作者机构：
Department of Chemistry, Central China Normal University, WuhanPeople's Republic of China
通讯机构：
[HU, ZM] C;CENT CHINA NORMAL UNIV, DEPT CHEM, WUHAN, PEOPLES R CHINA.
摘要：
With the assumptions that the radial dependence of the atomic orbitais (AO) is ignored and that the projection method is employed, a general procedure is presented for the discussion of hybridization and bond strength based on the maximum overlap method (MOM). The procedure was used for the non-equivalent hybrid atomic orbitais (HAO) in ML4 systems. The formulae of the bond strength according to Pauling are derived and the connection between the equivalent and non-equivalent hybrids is discussed. In combination with the results of previous work, it is shown that there is total coincidence between the approximate MOM and classical hybrid theory.
