Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Polyhedron called Synthesis of a cyano-bridged Fe2Mn linear unit and a Fe2Mn2 square unit by using the [fac-Fe{HB(pz)3}(CN)3]- building block, Author is Kim, Jinkwon; Han, Sujin; Cho, In-Ku; Choi, Ki Young; Heu, Min; Yoon, Seokwon; Suh, Byoung Jin, which mentions a compound: 18583-60-3, SMILESS is [BH-](N1N=CC=C1)(N2N=CC=C2)N3N=CC=C3.[K+], Molecular C9H10BKN6, Recommanded Product: Potassiumtris(1-pyrazolyl)borohydride.
Mononuclear (LH2)[Fe{HB(pz)3}(CN)3]2·2H2O·2MeOH (2) (L = C-meso-3,14-dimethyl-2,6,13,17-tetraazatricyclo[16.4.0.07,12]docosane) and two cyano-bridged bimetallic complexes [{Fe{HB(pz)3}(CN)3}2Mn(MeOH)4]·2MeOH (3) and [Mn2Fe2{HB(pz)3}2(CN)6(2,2′-bipyridine)2](ClO4)2·4MeCN (4) were prepared and their structures and magnetic properties studied. A crystal structure anal. of complex 2 revealed a H bonded dimeric structure of two [Fe{HB(pz)3}(CN)3]- anions and two H2O mols. The structure of 3 consists of a neutral FeIII-MnII-FeIII mol. and two crystal MeOH mols. The Mn ion is coordinated by two [Fe{HB(pz)3}(CN)3]- moieties through cyanide bridging ligands with trans geometry, resulting in a linear trinuclear structure. Reaction of the 2,2′-bipyridine ligand with complex 3 gave complex 4. The crystal structure of 4 consists of a discrete tetranuclear square Fe2Mn2 complex, two perchlorate anions and four MeCN solvent mols. The Mn ions are surrounded by two 2,2′-bipyridine ligands and bridged by two [Fe(tbp)(CN)3]- moieties through cyanide bridging ligands to form a cyclic tetranuclear structure. The magnetic properties of 3 and 4 are dominated by a weak antiferromagnetic interaction of low-spin FeIII (S = 1/2) and high-spin MnII (S = 5/2). The FeIII-MnII coupling constant J is -5.90(9) or -7.6(2) cm-1 for 3 and -2.29(3) cm-1 for 4.
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