ISSN 1070-3632, Russian Journal of General Chemistry, 2016, Vol. 86, No. 4, pp. 953–957. © Pleiades Publishing, Ltd., 2016. 953 Synthesis, Crystal Structure, and Magnetic Characteristics of Chiral Cyanide-Bridged Fe–Cu Complex 1 C. Xue a , H. Yuan b , H. Zhang a , and D. Zhang a a College of Chemical Engineering, Shandong University of Technology, Zibo, 255049 China e-mail: dpzhang73@126.com b Jiangxi Institute of Materia Medica, Nanchang, 330029 China Received October 29, 2015 Abstract—Based on the building blocks, trans-dicyanide Fe(III) precursor and chiral amine Cu(II) compound, the chiral cyanide-bridged heterometallic Fe(III)–Cu(II) complex with the formula {[Cu(R/R-Chxn) 2 Fe(bpmb)· (CN) 2 ][Fe(bpmb)(CN) 2 ]}·CH 3 OH·H 2 O (1) [bpmb 2– = 1,2-bis(pyridine-2-carboxamido)-4-methylbenzenate, R,R-Chxn = R,R-1,2-diaminocyclohexane] has been synthesized and characterized by elemental analysis, IR spectra and X-ray analysis. The latter revealed that the complex contained the cyanide-bridged cationic binuclear entity and free anionic cyanide building block. The complex demonstrated weak ferromagnetic coupling between neighboring Fe(III) and Cu(II) ions via the bridging cyanide group. Keywords: chiral, cyanide-bridged, crystal structure, magnetic property 1 The text was submitted by the authors in English. INTRODUCTION Cyanide-bridged magnetic complexes have attracted close attention not only due to their variable structure types (from 0D cluster to 3D network) but also, more importantly, to their important applications in high-TC magnets [1, 2], photomagnets [3–5], spin- crossover materials [6–8], chiral magnets [9–13], single-molecule magnets (SMMs) [14–16], single chain magnets (SCMs) [17–19], and a variety of other new technologies [20–25]. The current study targeted preparation of new chiral molecular magnetic materials based on low-dimension cyanide-bridged compounds that would be good candidates for assembling cyanide- bridged magnetic complexes [26–29]. The reaction of trans-dicyanide Fe(III) precursor with the chiral organic amine copper compound (Scheme 1) made it possible to synthesize the binuclear chiral cyanide- bridged Fe(III)–Cu(II) complex, {[Cu(R/R-Chxn) 2 Fe· (bpmb)(CN) 2 ][Fe(bpmb)(CN) 2 ]}·CH 3 OH·H 2 O (1). EXPERIMENTAL CHN analysis was carried out with an Elementary Vario El. IR spectra were recorded for KBr pellets on a Magna-IR 750 spectrophotometer. Variable- temperature magnetic susceptibility was performed on a Quantum Design MPMS SQUID magnetometer. The experimental susceptibilities were corrected for dia- magnetism of the constituent atoms (Pascal’s tables). All chemicals and solvents were reagent grade used without further purification. K[Fe III (bpmb)(CN) 2 ] [bpmb 2– = 1,2-bis(pyridine-2-carboxamido)-4-methyl- benzenate] was synthesized according to the reported method [30]. Preparation of complex 1. The acetonitrile solu- tion (10 mL) formed in situ by [Cu(ClO 4 ) 2 ]·6H 2 O (36.5 mg, 0.1 mmol) and R,R-1,2-diaminocyclohexane (22.8 mg, 0.2 mmol) was added slowly to a solution DOI: 10.1134/S1070363216040332 N N N N O O Fe C N C N − H 2 N Cu NH 2 H 2 N NH 2 2+ trans-[Fe II (bpmb)(CN) 2 ] − Cu[RR-Chxn] 2+ Scheme 1. Starting materials used for the synthesis of complex 1.