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Source of materialCobalt(II) acetate, equimolar 4-methyl-1,4,7-triazaheptane and two equivalent molar salicylaldehyde were dissolved in methanol and mixed together. The clear pink solution gradually got dark red. It was stood still in air for one week. Large cubic crystals were precipitated. They were filtered and washed with methanol and dried in air (yield 68 %). DiscussionCobalt is an important life-required element. Many cobalt(II,III) complexes were prepared and structurally determined by single X-ray analysis [1][2][3][4][5][6][7]. Especially, complexes with various Schiff bases are a hot branch of cobalt chemistry [1,2,4,6,7]. The title compound is a discrete mononuclear cobalt(III) complex. The central cobalt(III) atom is five-coordinated by three oxygen atoms and two nitrogen atoms from one tetradentate diSchiff base ligand and one unidentate acetate anion. The metal is in a distorted square-pyramidal environment with the oxygen atom from the acetate situated in the apical position and the four donors from the Schiff base constituting the basal plane. The mean deviation of the basal plane is 0.151(2) Å, and the central cobalt(III) is 0.131(2) Å above the plane towards the apical oxygen atom. The dihedral angles between the Co basal plane and the two benzene rings in the Schiff base are 36.3(2)°and 28.2(2)°, and the two aromatic rings are at the angle of 64

Source of materialThe title compound was prepared similarly to the procedure already reported [1]. MnCl 2 · 6H 2 O and two equimolar amount 1,3-diaminopropane were dissolved in water and stirred for 1 h, during which the solution slowly changed from pale pink to dark violet. The mixed solution was stood in air for two weeks and filtered. The crystals obtained were washed with water, ethanol and diethyl ether, successively, and dried in air overnight (yield 48 %). DiscussionMetal complexes with various organic ligands-containing nitrogen atoms have been a hot topics in the field of coordination chemistry [2][3][4][5]. Manganese element exists in some native enzymes and is required by creatures. Due to their biological relevant important behaviors, many manganese complexes with polyamine ligands have been reported in recent years [6][7][8].The title crystal structure consists of one mononuclear complex cation, one chloride anion and one lattice water molecule. In the cation, the central manganese(III) atom is six-coordinated by four nitrogen atoms from two 1,3-diaminopropane molecules and by two nitrogen atoms from a carbonate anion. Both the amine and the carbonate group are bidentate ligands. The manganese atom is in a distorted octahedral environment, and the MnO and MnN bond lengths are in normal range. All the oxygen atoms both of the water and the carbonate anions, and all the nitrogen atoms participate to form hydrogen bonds, which join the constituents into a three-dimensional structure.