Crystal structure oftrans-diammine(1,4,8,11-tetraazacyclotetradecane-κ⁴N)chromium(III) tetrachloridozincate chloride monohydrate from synchrotron data

Abstract

Four independent CrIII ions are present in the title structure, each situated on an inversion centre and with a distorted octa­hedral coordination sphere by six N atoms (four from a cyclam ligand in the equatorial plane and two in axial positions). The crystal packing is stabilized by extensive hydrogen-bonding inter­actions between the mol­ecular and ionic moieties.

Crystal structure of tris(trans-1,2-cyclohexanediamine-κ2N,N′)chromium(III) tetrachloridozincate chloride trihydrate from synchrotron data

“…Since counter-anionic species play a very important role in coordination chemistry and supramolecular chemistry (Fabbrizzi & Poggi, 2013;Santos-Figueroa et al, 2013), changing the type of anion can also result in different structural properties. With respect to the tetrachloridozincate anion, [ZnCl 4 ] 2À , the crystal structures of complexes with trivalent chromium have been determined for [Cr(NH 3 ) 6 ][ZnCl 4 ]Cl (Clegg, 1976), [Cr(en) 3 ][ZnCl 4 ]Cl (en is ethylenediamine; Pons et al, 1988) and trans-[Cr(NH 3 ) 2 (cyclam)][ZnCl 4 ]ClÁH 2 O (cyclam is 1,4,8,11-tetraazacyclotetradecane; Moon & Choi, 2016). However, a combination of the [Cr(chxn) 3 ] 3+ cation with [ZnCl 4 ] 2À and Cl À as anions is unreported.…”