Iron(III), cobalt(II) and zinc(II) coordination compounds with a carboximidamide ligand: Synthesis, structures and properties

Meva Francois Eyaane; Prior Timothy John; Evans David John; Shah Sachin; Cespedes Oscar

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Iron(III), cobalt(II) and zinc(II) coordination compounds with a carboximidamide ligand: Synthesis, structures and properties

机译：铁（III），钴（II）和锌（II）配合化合物，具有羧酰胺酰胺配体：合成，结构和性能

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摘要

Coordination complexes of iron(III), cobalt(II) and zinc(II) with the ligand N '-{[1-(pyridin-2-yl)ethylidene] amino}pyridine-2-carboximidamide (pmhpa) have been synthesised and were structurally characterized by elemental analysis, mass spectrometry, X-ray diffraction and infrared spectroscopy. The mononuclear iron(III) complex, [Fe(pmhap)2][FeCl4], (1), adopts the orthorhombic non-centric space group P2(1)2(1)2(1). The iron is present in an octahedral environment in the ion [Fe(pmhap)(2)](+). The crystallographically-determined formula of the cobalt(II) complex (2) is [Co-2(pmhap)(2)Cl-3](2)[CoCl4].4MeOH. The compound crystallizes in the non-centric space group P42(1)c with a single cobalt ion in the asymmetric unit. The complex is dinuclear, with two cobalt ions bridged by chloride and the two nitrogen atoms of N=N of the pmhap ligand. The zinc(II) complex; [Zn-2(pmhpa)(3)](NO3)(4).2.75MeOH (3) crystallizes in the cubic space group Paa with disordered methanol molecules present. This is dinuclear with the two zinc atoms being bridged by three N=N links from the ligand to form a threefold symmetric rotor. Infrared spectroscopy confirms that coordination occurs through the azide bridge. Measurements of magnetic susceptibility for the iron(III) and cobalt(II) complexes show that they are paramagnetic between 5 and 300 K. Mossbauer spectroscopic data supports the structure of the iron(III) complex being composed of an octahedral and a tetrahedral iron atom.

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来源
《Inorganic Chemistry Communications》 |2020年第1期|共8页
作者
Meva Francois Eyaane; Prior Timothy John; Evans David John; Shah Sachin; Cespedes Oscar;
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作者单位

Univ Douala Fac Med &

Pharmaceut Sci Dept Pharmaceut Sci POB 2701 Douala Cameroon;

Univ Hull Dept Chem &

Biochem Kingston Upon Hull HU6 7RX N Humberside England;

Univ Hull Dept Chem &

Biochem Kingston Upon Hull HU6 7RX N Humberside England;

Univ Hull Dept Chem &

Biochem Kingston Upon Hull HU6 7RX N Humberside England;

Univ Leeds Sch Phys &

Astron Leeds LS2 9JT W Yorkshire England;

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原文格式 PDF
正文语种 eng
中图分类无机化学;基本无机化学工业;
关键词
Coordination complexes; Carboxamidrazine; X-ray structure; Magnetism;

机译：协调络合物;羧胺嘧啶;X射线结构;磁性;

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Iron(III), cobalt(II) and zinc(II) coordination compounds with a carboximidamide ligand: Synthesis, structures and properties

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