Pentacoordinate Ni(II) complex: Synthesis, crystal structure and magnetism

被引：0

作者：

Smolko, Richard ^{[1
,2
]}

Falvello, Larry R. ^{[3
]}

Ara, Irene ^{[4
]}

Titis, Jan ^{[5
]}

Boca, Roman ^{[6
]}

Cernak, Juraj ^{[1
]}

机构：

[1] P J Safarik Univ Kosice, Fac Sci, Dept Inorgan Chem, Moyzesova 11, Kosice 04154, Slovakia

[2] Slovak Acad Sci, Inst Expt Phys, Watsonova 47, Koice 04101, Slovakia

[3] Univ Zaragoza, Dept Quim Inorgan, Inst Nanociencia & Mat Aragon INMA, CSIC, Zaragoza 50009, Spain

[4] Univ Zaragoza, Dept Quim Inorgan, Inst Sintesis Quim Catalisis Homogenea ISQCH, CSIC, Pedro Cerbuna 12, E-50009 Zaragoza, Spain

[5] Univ SS Cyril & Methodius, Fac Nat Sci, Dept Chem, Nam J Herdu 2, Trnava 91701, Slovakia

[6] Univ SS Cyril & Methodius, Fac Hlth Sci, Nam J Herdu 2, Trnava 91701, Slovakia

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2025年 / 1337卷

关键词：

Nickel(II); Pentacoordination; Schiff base ligand; Magnetism; Zero-field splitting; MOLECULAR-STRUCTURE; ANISOTROPY; RELAXATION; NI;

D O I：

10.1016/j.molstruc.2025.142198

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ni(II) complex [Ni(na-dmdpa)] (H2(na-dmdpa) =1,1 '-((1E,1 ' E)-(((methylazanediyl)bis(propane-3,1iyl))bis(aza-neylylidene))bis(methaneylylidene))bis(naphthalen-2-ol) has been synthesized using Schiff-base type pentadentate ligand formed by condensation of 2-hydroxynaphthaldehyde with 3,3 '-diamino-N-methyldipropylamine. The crystal structure is built up of com-plex molecules [Ni(na-dmdpa)]. The Ni(II) centre exhibits pentacoordination and its coordination sphere is formed by deprotonated Schiff base acting as doubly chelating pentadentate dianionic ligand. Calculated tau value for complex [Ni(na-dmdpa)] indicates that the coordination polyhedron is an intermediate between trigonal bipyramid and square pyramid. Complex is stable at RT. From the magnetic study follows that the axial zero-field splitting parameter is significantly negative (D/hc =-51 cm-1) and the value of rhombicity is moderate (E/hc =2.4 cm-1). Theoretical calculations support the magnetic experimental result. The out-of-phase component of the AC susceptibility is silent

引用

页数：7

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