Synthesis, spectroscopic characterization and X-ray structure determination of tetrabutylammonium trans-diamminetetranitrocobaltate(III)

Research paper by Raj Pal Sharma, Rajni Sharma, Ritu Bala, Dip Singh Gill, Sukhjinder Singh, Jugal Kishor Puri, Luca Russo, Kari Rissanen

Indexed on: 27 Jul '06Published on: 27 Jul '06Published in: Journal of chemical crystallography


The cobalt(III) complex salt [(C4H9)4N][trans-Co(NH3)2(NO2)4] has been synthesized in high yield by reacting equimolar quantities of [(C4H9)4N]Br and K[trans-Co(NH3)2(NO2)4] in aqueous medium at room temperature. The product thus formed has been re-crystallised from acetone-water mixture, in the monoclinic space group P 21/n, with cell dimensions a=11.651(3) Å, b=19.005(4) Å, c=11.733(5) Å, β=90.28(3)°. The X-ray structure determination revealed the presence of discrete ions, [(C4H9)4N]+ and [trans-Co(NH3)2(NO2)4]−. The central metal ion cobalt(III) in the anion is found in octahedral environment, in trans geometry, while the organic counterion is a quaternary alkylammonium cation. The crystal lattice is stabilized by electrostatic interactions between the cations and anions.