Crystal structure and spectroscopic properties of trans-dichlorobis(1,3-propane-diamine)chromium(III) perchlorate |
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| Authors: | J -H Choi A Takayama and T Suzuki |
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| Institution: | (1) Department of Chemistry, Andong National University, Andong, 760-749, Korea;(2) School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK;(3) Department of Chemistry, Kyungpook National University, Daegu, 702-701, Korea |
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| Abstract: | The crystal structure of trans-Cr(tn)2Cl2]ClO4 (tn = 1,3-propanediamine) is determined by a single-crystal X-ray diffraction study at 185 K. The Cr atom is in a slightly distorted octahedral environment coordinated by four nitrogen atoms of two tn ligands and two chlorine atoms in trans position. The orientations of two six-membered rings in the complex cation are in an anti chair-chair conformation with respect to each other. The mean Cr-N(tn) and Cr-Cl bond lengths are 2.0862(2) ? and 2.3112(6) ? respectively. The ClO4− anions have a slightly distorted tetrahedral geometry with Cl-O lengths and O-Cl-O angles influenced by the hydrogen bonding. The crystal packing is stabilized by several hydrogen bonds. The infrared and electronic absorption spectral properties are also described along with the results of X-ray crystallography. |
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