A New Chiral Ni4O4 Distorted Cube: Synthesis, Structure, and Magneto-Structural Correlation

authors	Sen, R; Lopes, AML; Lin, Z; Brandao, P; Araujo, JP
nationality	International
journal	EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
author keywords	Nickel; Chirality; Schiff-base; Polynuclear complex; Magnetic properties
keywords	TETRANUCLEAR CUBANE; MAGNETIC-PROPERTIES; CLUSTER COMPLEXES; NI-4; COORDINATION; CARBOXYLATE; FAMILY; UNITS; DICUBANE; BEHAVIOR
abstract	A new chiral tetranuclear Ni4O4 complex has been developed with distorted cubane-type structure. The structure was determined by single-crystal X-ray diffraction. The new tetradentate Schiff-base ligand in this compound was synthesized via the condensation of 2 '-hydroxyacetophenone and (R)-3-amino-1,2-propanediol. Temperature dependent magnetization measurements showed a predominant ferromagnetic interaction among the four Ni centers. The best fit of the chi T vs. T curve results in a solution with two exchange interaction values, J(1)=12.7 cm(-1), and J(2)=1.6 cm(-1) which are appreciably correlated with the structure. Ac susceptibility data were collected between 2 and 28 K and it is found that the data display a small frequency dependence with the peaks shifting to higher temperatures with increasing frequencies.
publisher	WILEY-V C H VERLAG GMBH
issn	1434-1948
isbn	1099-0682
year published	2019
volume	2019
issue	34
beginning page	3840
ending page	3845
digital object identifier (doi)	10.1002/ejic.201900662
web of science category	Chemistry, Inorganic & Nuclear
subject category	Chemistry
unique article identifier	WOS:000484420200001