Structural, Spectroscopic, and Magnetic Study of Bis(9,10-dihydro-9-oxo-10-acridineacetate)bis(imidazole)bis(methanol) Nickel(II)
详细信息 查看全文
- 作者：Danuta Dobrzy
//pubs.acs.org/images/entities/nacute.gif" border="0">ska ; Lucjan B. Jerzykiewicz ; Marek Duczmal ; Agnieszka Wojciechowska ; Katarzyna Jab
- 刊名：Inorganic Chemistry
- 出版年：2006
- 出版时间：December 25, 2006
- 年：2006
- 卷：45
- 期：26
- 页码：10479 - 10486
- 全文大小：163K
- 年卷期：v.45,no.26(December 25, 2006)
- ISSN：1520-510X
文摘
The mixed ligand complex [Ni(CMA)2(im)2(MeOH)2] (where CMA = 9,10-dihydro-9-oxo-10-acridineacetate ion, im= imidazole) was prepared, and its crystal and molecular structure were determined. The nickel ions are hexa-coordinated by four oxygen atoms of the carboxylate and hydroxyl groups and by two imidazole nitrogen atoms,to form a distorted octahedral arrangement. The structure consists of a one-dimensional network of the complexmolecules connected by strong intermolecular hydrogen bonds. The weak intermolecular C-H···X hydrogen bondsand stacking interactions make up the 2-D structure. Very strong intramolecular hydrogen bonds significantly affectthe geometry and vibrational characteristics of the carboxylate group. The UV-vis-NIR electronic spectrum wasdeconvoluted into Gaussian components. Electronic bands of the Ni(II) ion were assigned to suitable spin-allowedtransitions in the D4h symmetry environment. The single ion zero-field splitting (ZFS) parameters for the S = 1state of Ni(II), as well as the g components, have been determined by high-field and high-frequency EPR (HF-HFEPR) spectroscopy over the frequency range of 52-432 GHz and with the magnetic fields up to 14.5 T: D =5.77(1) cm-1, E = 1.636(2) cm-1, gx = 2.29(1), gy = 2.18(1), and gz = 2.13(1). These values allowed us tosimulate the powder magnetic susceptibility and field-dependent magnetization of the complex.