Transition metal salts of 2-amino-3, 5-dihalopyridine - dimers: syntheses, structures and magnetic properties of (3, 5-diCAPH)2Cu2Br6 and (3, 5-diBAPH)2Cu2X6. Issue 23 (2nd December 2017)

• Record Type: Journal Article
• Authors: Anagnostis, Jason; Cipi, Joris; Landee, Christopher P.; Tremelling, Grant W.; Turnbull, Mark M.; Twamley, Brendan; Wikaira, Jan L.
• Is Part Of: Journal of coordination chemistry. Volume 70:Issue 23(2017)
• Page Start: 3892
• Page End: 3906
• Publication Date: 2017-12-02
• Subjects: Cu(II) -- dimer -- magnetic susceptibility -- X-ray structures; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2017.1413183
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: Three dimeric copper(II) complexes have been prepared with the general formula bis(2-amino-3, 5-dihalopyridinium)hexahalodicuprate cuprate(II): (3, 5-diCAPH)2 Cu2 Br6 (1 ), (3, 5-diBAPH)2 Cu2 Cl6 (2 ) and (3, 5-diBAPH)2 Cu2 Br6 (3 ) [3, 5-diCAPH = 2-amino-3, 5-dichloropyridinium; 3, 5-diBAPH = 2-amino-3, 5-dibromopyridinium]. The compounds have been characterized via single crystal X-ray diffraction and temperature dependent magnetic susceptibility measurements. All three compounds crystallize in monoclinic space groups (1, C 2/ c ;2 and3, P 21 / c ) and exhibit alternating layers of hexahalodicuprate ions and organic cations. The hexahalodicuprate ions exhibit short X⋯Cu and X⋯X contacts which link the dimers into a square array. Variable temperature magnetic susceptibility data reveal strong intradimer antiferromagnetic exchange ( J = −153, −65, −122 K for1 –3, respectively), but negligible inter-dimer magnetic exchange. Abstract :