Synthesis, Crystal Structure and Spectrum Properties of Trinuclear Manganese Coordination Compound Mn₃（2,2’-bipy）₂（3,5-DMBA）₆

【摘要】 A novel complex Mn3(2,2’-bipy)2(3,5-DMBA)6 with 3,5-dimethylbenzoic acid (3,5-DMBA) and 2,2’-bipyridine (2,2’-bipy) has been synthesized by means of a solvent method. It crystallizes in the monoclinic space group C2/c with a=3.1118(6), b=1.1754(2), c=2.0887(4) nm, β=118.50(3)o, V=6.714(2) nm3 , Dc=1.384 g/cm3 , Z=8, F(000)=2912, the final GOOF=1.078, R=0.0691 and wR=0.1455. The crystal structure shows that the three coordinated manganese(Ⅱ) ions lie in a line with the middle one as the symmetric center. The distance between the central manganese(Ⅱ) and the symmetric one is 0.3549 nm. There exist two coordination modes for the three manganese (Ⅱ) ions: the symmetric manganese(Ⅱ) ions are coordinated with three oxygen atoms and two nitrogen atoms from three 3,5-DMBA molecules and one 2,2’-bipy molecule, respectively, forming a distorted square-pyramidal coordination geometry; the middle manganese(Ⅱ) ion is coordinated with six oxygen atoms from six 3,5-DMBA molecules, generating a distorted octahedral coordination geometry. Spectrum properties of the complex were also studied.更多还原

【Abstract】 A novel complex Mn3(2,2’-bipy)2(3,5-DMBA)6 with 3,5-dimethylbenzoic acid (3,5-DMBA) and 2,2’-bipyridine (2,2’-bipy) has been synthesized by means of a solvent method. It crystallizes in the monoclinic space group C2/c with a=3.1118(6), b=1.1754(2), c=2.0887(4) nm, β=118.50(3)o, V=6.714(2) nm3 , Dc=1.384 g/cm3 , Z=8, F(000)=2912, the final GOOF=1.078, R=0.0691 and wR=0.1455. The crystal structure shows that the three coordinated manganese(Ⅱ) ions lie in a line with the middle one as the symmetric center. The distance between the central manganese(Ⅱ) and the symmetric one is 0.3549 nm. There exist two coordination modes for the three manganese (Ⅱ) ions: the symmetric manganese(Ⅱ) ions are coordinated with three oxygen atoms and two nitrogen atoms from three 3,5-DMBA molecules and one 2,2’-bipy molecule, respectively, forming a distorted square-pyramidal coordination geometry; the middle manganese(Ⅱ) ion is coordinated with six oxygen atoms from six 3,5-DMBA molecules, generating a distorted octahedral coordination geometry. Spectrum properties of the complex were also studied.更多还原