Cobalt and zinc halide complexes of 4-chloro and 4-methylaniline: Syntheses, structures and magnetic behavior. (1st August 2019)

• Record Type: Journal Article
• Authors: Chellali, Jonathan E.; Keely, Cailyn; Bell, Graham; Dimanno, Kimberly L.; Tran, Tran; Landee, Christopher P.; Dickie, Diane A.; Rademeyer, Melanie; Turnbull, Mark M.; Xiao, Fan
• Is Part Of: Polyhedron. Volume 168(2019)
• Page Start: 1
• Page End: 10
• Publication Date: 2019-08-01
• Subjects: Cobalt(II) -- Zinc(II) -- Substituted anilines -- Magnetic susceptibility -- X-ray structure; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2019.04.025
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: Reaction of Co(II) and Zn(II) halides with 4-chloro and 4-methylaniline produced an isocoordinate family of compounds. The Co(II) compounds exhibit antiferromagnetic interactions. Abstract: A family of cobalt(II) and zinc(II) compounds with the general formula (4-subC6 H4 NH2 )2 MX2, (M = Co, Zn; X = Cl, Br; sub = CH3, Cl) has been prepared and the compounds characterized by single-crystal X-ray diffraction. The eight compounds crystallize in the monoclinic space group I 2/a and are isocoordinate, but show different crystal packing for the 4-methyl and 4-chloroaniline complexes as a result of halogen bonding in the 4-chloroaniline family. The cobalt complexes have also been studied via variable temperature magnetic susceptibility measurements. All four Co(II) compounds exhibit antiferromagnetic exchange (maxima in χ are observed) and have been fitted with a 1D-chain model (cobalt chloride complexes, J ∼ −3 K) or a 2D-model (cobalt bromide complexes, J ∼ −4 K). Analysis of potential superexchange pathways is provided.