| Abstract: Two complexes [Mn(ntb)(nic)]ClO4·H2O (1) and [Mn(ntb)(pic)]ClO4·CH3OH·2H2O (2) have been prepared and structurally characterized, where ntb is tris(2-benzimidazolylmethyl)amine, nic is anion of nicotinic acid and pic is anion of picolinic acid. X-ray analysis indicates that complexes 1 and 2 are both mononuclear and the Mn(Ⅱ) center adopts trigonal-bipyramidal and distorted octahedral coordination geometry, respectively. In complex 1, the nic anion coordinates with Mn(Ⅱ) ion through one of carboxylate oxygen atoms. In complex 2, the pic anion coordinates with Mn(Ⅱ) ion in bidentate N,O-chelating mode. Furthermore, complex 1 reveals 1D, 2D dimensional structures based on intermolecular hydrogen-bonding interactions. Complex 2 has 1D chain through intra-, intermolecular hydrogen-bonding interaction. Crystal data: [Mn(ntb)(nic)]ClO4·H2O (1), Mr=701.99 g·mol-1, Triclinic, P1, a=1.002 47(13) nm, b=1.256 40(15) nm, c=1.303 33(13) nm, α=83.470(8)°, β=78.701(9)°, γ=76.701(10)°, V=1.562 5(3) nm3, Z=2, R1=0.070 5, wR2=0.133 8 [I>2σ(I)]; [Mn(ntb)(pic)]ClO4·CH3OH·2H2O (2), Mr=752.04 g·mol-1, Triclinic, P1, a= 1.025 90(13) nm, b=1.296 70(16) nm, c=1.454 82(17) nm, α=72.525(7)°, β=72.041(6)°, γ=69.880(6)°, V=1.687 3(4) nm3, Z=2, R1=0.040 1, wR2=0.095 2 [I>2σ(I)]. CCDC: 725796, 1; 725797, 2. |
