Second-sphere coordination complex via hydrogen bonding: Synthesis, characterization, X-ray crystal structure determination and packing of hexaamminecobalt(III) chloride di(para-nitrobenzoate)

✍ Scribed by Raj Pal Sharma; Ritu Bala; Rajni Sharma; Julio Perez; Daniel Miguel

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 331 KB
• Volume: 797
• Category: Article
• ISSN: 0022-2860
• DOI: 10.1016/j.molstruc.2006.03.046

✦ Synopsis

A reddish orange coloured crystalline solid of hexaamminecobalt(III) chloride di(para-nitrobenzoate) was obtained when hexaamminecobalt(III) chloride was reacted with the sodium salt of para-nitrobenzoic acid (1:3 molar ratio) in hot aqueous medium. This cobalt(III) complex salt has been characterized by elemental analyses and spectroscopic techniques (e.g. UV/visible, IR and NMR). Single-crystal X-ray structure determination of the title complex salt revealed that it contains the cationic cobaltammine ([Co(NH 3 ) 6 ] 3+ ) and mixed anions (Cl À , NO 2 C 6 H 4 COO À ), which are held together by electrostatic forces attractions through secondsphere coordination, i.e. N-HÁ Á ÁO (carboxylate and nitro) and N-HÁ Á ÁCl hydrogen bonds, resulting in a three-dimensional network.