4.2.1. Synthesis, characterization and antibacterial activity of cyclohexyltin N-(salicylidene)valinates

grap-astract-CIS2016-v4-n2-Tian

Xiaowen Shi, Guochao Kong, Lin Liu, Hong Gao, Xue Gao, Laijin Tian*

Key Laboratory of Natural Products and Pharmaceutical Intermediates, Qufu Normal University, Qufu 273165, China.

* Corresponding author, e-mail: laijintian@163.com

Received: April 14, 2016; accepted: May 22, 2016

Abstract: Two new cyclohexyltin N-(salicylidene)valinates, [2-HOC6H4CH=NCH(CH(CH3)2)COO]SnCy3 (1) and [2-OC6H4CH=NCH(CH(CH3)2)COO]SnCy2 (2) (Cy = cyclohexyl), have been synthesized and characterized by elemental analysis, IR, and 1H NMR. The crystal structure of 2 has been determined by X-ray single crystal diffraction. In the complexes, the carboxylate is monodentate. Complex 1 is a four-coordinated tin compound, and 2 has a distorted trigonal bipyramidal geometry with the axial locations occupied by one carboxylate oxygen and a phenolic oxygen of the ligand. Bioassay results show that 1 and 2 have good in vitro antibacterial activity against Escherichia coli.

(1.4 MiB, 152 downloads)

http://dx.doi.org/10.21060/cis.2016.421

4.1.1. Synthesis, crystal and molecular structure of manganese (II) complex of  2-acetylpyridine N (4) ethylthiosemicarbazone

grap-astract-CIS20151214

 

1Felicite Majoumo-Mbe, 1Dieudonne T. Nde, 1Irene N. Mukoko and 2Offiong E. Offiong, 1Emmanuel N. Nfor*

1Department of Chemistry, Faculty of Science, University of Buea, PO Box 63 Buea, Cameroon. 2Department of Pure & Applied Chemistry, University of Calabar, PO Box 1115 Calabar, CRS, Nigeria.

Corresponding Author*: nforemman@gmail.com

Received: December 14, 2015; accepted: February 05, 2016

Abstract

A novel Mn(II) complex with thiosemicarbazone derived from 2-acetylpyridine and N(4)-ethylthiosemicarbazide has been prepared. The single-crystal X-ray analysis of the Mn(II) complex showed a distorted octahedral MnN4S2 environment with the ligand chelating via the nitrogen and sulfur donor atoms in a tridentate manner. The triclinic form of the ligand which has crystallized in a monoclinic system in other works is also described. The basicity of nitrogen atoms of the ligand was tested with its reaction with HNO3 and the structure of the salt obtained is reported. The result shows that the lone pair of the pyridine nitrogen is more available due to the delocalization of other nitrogen lone pair of electron.

(955.5 KiB, 233 downloads)

http://dx.doi.org/10.21060/cis.2016.411

Volume 3 (2015): Nº3

Cover-1-CIS-2015-v-3-n3-400px

Table of Contents

Cover & Index

(1.0 MiB, 122 downloads)

3.3.1. Synthesis, Spectroscopy and Structural Analysis of Technetium and Rhenium Nitrosyl Complexes.

Terrence Nicholson*, Esther Chunb, Ashfaq Mahmood, Peter Mueller, Alan Davisona and Alun G. Jones.

 

1-N3-V3-Grap-abstract-Nicholson20150604

(707.9 KiB, 334 downloads)

 

3.3.2. Synthesis, crystal structure and biological activity of 1-(phthalazin-1(2H)-one)[(Pyridin-2-yl)ethylidene]hydrazone and its cobalt (III) complex.

Felicite Majoumo-Mbe, Emmanuel N. Nfor*, Eric B. Sengeh, Romanus N. Njong and Offiong E. Offiong.

2-N3-V3-Gra-Abs-Nfor

(580.1 KiB, 264 downloads)

3.3.3. Synthesis, structural characterization and antibacterial activity of bis(triorganotin) 2-butynedioates.

Wenqiang Wang, Xiaowen Shi, Qingtao Liu, Xijie Liu, Laijin Tian*

Tian-v3n3-2015

 

(379.0 KiB, 275 downloads)

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