Assey Gervas, Butcher Ray J, Gultneh Yilma
Department of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA.
Acta Crystallogr Sect E Struct Rep Online. 2010 Jun 26;66(Pt 7):m851-2. doi: 10.1107/S1600536810023366.
The asymmetric unit of the title compound, [Mn(C(18)H(18)N(2)O(4))(CH(3)OH)(H(2)O)]ClO(4)·0.5H(2)O, contains two complex cations and two perchlorate anions, one of which is disordered over two positions in a 0.767 (8):0.233 (8) ratio. The Mn(III) atoms are in distorted octa-hedral environments. In addition to the equatorial tetra-dentate salicylaldimine ligand, each Mn is axially coordinated by both a methanol and a water mol-ecule. The complex is a dimer held together by multiple strong and weak hydrogen-bonding inter-actions between the coordinated water mol-ecule on one monomer with all the phenolic and meth-oxy O atoms on the other monomer. In addition, the two perchlorate anions are linked by hydrogen bonds to the two methanol mol-ecules coordinated to each Mn center. The Mn-O phenolic bond distances range from 1.868 (2) to 1.882 (2) Å while the Mn-N distances range from 1.978 (2) to 1.981 (2) Å. Mn-O distances for the axial water and methanol ligands are longer at 2.226 (2)/2.257 (2) and 2.313 (2)/2.324 (2) Å, reflecting the usual Jahn-Teller distortion as found in Mn(III) complexes.
标题化合物[Mn(C₁₈H₁₈N₂O₄)(CH₃OH)(H₂O)]ClO₄·0.5H₂O的不对称单元包含两个络合阳离子和两个高氯酸根阴离子，其中一个在两个位置上无序，比例为0.767(8):0.233(8)。Mn(III)原子处于扭曲的八面体环境中。除了赤道平面上的四齿水杨醛亚胺配体，每个Mn原子还通过一个甲醇分子和一个水分子轴向配位。该络合物是一个二聚体，通过一个单体上配位的水分子与另一个单体上所有酚羟基和甲氧基O原子之间的多个强弱氢键相互作用结合在一起。此外，两个高氯酸根阴离子通过氢键与每个Mn中心配位的两个甲醇分子相连。Mn-O酚羟基键长范围为1.868(2)至1.882(2) Å，而Mn-N键长范围为1.978(2)至1.981(2) Å。轴向水和甲醇配体的Mn-O键长较长，分别为2.226(2)/2.257(2)和2.313(2)/2.324(2) Å，这反映了Mn(III)络合物中常见的姜-泰勒畸变。
