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Synthesis, spectroscopic characterisation and X-ray structure of [trans-Co(en)2(NO2)2]2(Cr2O7)

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Abstract

Dark red crystals of bis[trans-dinitrobis(ethylenediamine)cobalt(III)] dichromate, [trans-Co(en)2(NO2)2]2(Cr2O7) have been obtained by slowly allowing to mix the solutions of potassium dichromate and trans-dinitrobis(ethylenediamine)cobalt(III) nitrate in 1:2 molar ratio in aqueous medium. Elemental analyses and spectroscopic techniques (IR, UV/visible, 1H and 13C NMR) were used for characterizing the complex salt. The complex salt crystallizes in the orthorhombic space group Fdd2 with unit cell dimensions a = 24.778(2) Å, b = 30.457(2) Å, c = 6.5364(5) Å, Z = 8, V = 4932.8(7) Å3, R1 = 0.0617 and wR2 = 0.1518. X-ray structure determination revealed an ionic structure consisting of cationic cobaltammine [trans-Co(en)2(NO2)2]NO3 and dichromate anion. It is the first crystal structure of this cation with a dianion.

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Authors and Affiliations

  1. Department of Chemistry, Center of Advanced Studies, Panjab University, Chandigarh, 160014, India

    Raj Pal Sharma, Rajni Sharma & Ritu Bala

  2. Departamento de Quimica Inorganica, Facultad de Ciencias, Universidad de Granada, 18071, Granada, Spain

    Juan M. Salas & Miguel Quiros

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  1. Raj Pal Sharma
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  2. Rajni Sharma
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  3. Ritu Bala
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  4. Juan M. Salas
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  5. Miguel Quiros
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Correspondence to Raj Pal Sharma.

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Sharma, R.P., Sharma, R., Bala, R. et al. Synthesis, spectroscopic characterisation and X-ray structure of [trans-Co(en)2(NO2)2]2(Cr2O7). J Chem Crystallogr 35, 769–775 (2005). https://doi.org/10.1007/s10870-005-3886-9

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  • DOI: https://doi.org/10.1007/s10870-005-3886-9

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