The reaction of cis-[Cr ([14]-decane)(OH 2 ) 2 ] + ([14]-decane = rac-5,5,7,12,12,14-hexamethyl-1,4,8,11-teraazacyclotetradecane) with auxiliary ligands {L a = citrate(cit)} leads to a new dimeric complex cis-[{Cr ([14]decane)(µ-cit)} 2 ](ClO 4 ) 2 . This binuclear complex has been structurally characterized by a combination of elemental analysis, conductivity, IR and Vis spectroscopy, mass spectrometry, and X-ray crystallography. Analysis of the crystal structure of cis-[{Cr

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... )} 2 ] + reveals that each chromium has a distorted octahedral coordination environment and citrato ligands are monodentate to the two chromium atoms via the carboxyl groups. For dimeric complex the bridging geometry is as follows: Cr...Cr = 7.361 Å; Cr-O(average) = 1.958 (8) Å; Cr-N range = 2.108 (9)-2.147 (9) Å; N(1)-Cr-N(3) (equatorial position) = 98.0(4) o ; N(2)-Cr-N(4) (axial position) = 166.4(4) o ; O(1)-Cr-N(2) = 98.1(4) o ; O(3)-Cr-N(4) = 96.6(3) o ; O(1)-Cr-O(3) = 90.4 o . The FAB mass spectrum of the dimeric complex displays peak due to the molecular ions cis-[{Cr([14]-decane) (µ-cit)} 2 ] + at m/z 1053.