NDLI: Synthesis, characterization and antioxidant evaluation of metal complexes derived from a dianil ligand with a flexible linkage: anomalous magnetic behavior of the nickel complex

Content Provider	Springer Nature Link
Author	Elhusseiny, Amel F. M Hassan, Hammed H. A. Hussien, Hend El Dissouky, Ali Palmer, Rex A. Cockcroft, Jeremy K.
Copyright Year	2015
Abstract	The synthesis and characterization of N,N′-bis (1-naphthaldimine)-p-oxydianiline, H$_{2}$L, and its Zn(II), Cu(II), Ni(II) and Co(II) complexes are reported. Single crystal X-ray structural analysis showed that H$_{2}$L consists of two tautomers where the central diphenylether unit is flanked by either two ketoamino forms or by one ketoamino and one enolimino form. Physico-chemical data revealed the formation of non-electrolytic [M$_{2}$L$_{2}$(2H$_{2}$O)$_{ n }$]·mH$_{2}$O (n and m = 0–2) complexes with variable geometries. The nickel complex exhibited anomalous magnetic behavior compared to literature analogues. This result is attributed to molecular association and suggests the existence of both planar and octahedral forms in a conformational equilibrium. These complexes exhibit thermal stability up to 700 °C, except for the Ni(II) complex which degraded to its oxide. Antimicrobial screening data showed that H$_{2}$L had no efficacy against a panel of pathogenic microorganisms, whereas the Ni(II) complex exhibited potency both as an antibacterial and antifungal agent. The properties of the complexes with respect to DPPH radical scavenging, acetyl cholinesterase inhibition and antihemolytic activity were evaluated.
Starting Page	643
Ending Page	655
Page Count	13
File Format	PDF
ISSN	03404285
Journal	Transition Metal Chemistry
Volume Number	40
Issue Number	6
e-ISSN	1572901X
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-07-09
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Catalysis Physical Chemistry Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Metals and Alloys Inorganic Chemistry

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