Crystal structure of dichloro-N,N-bis(pyridine-2-ylmethyl)cyclohexamino copper(II), C18H23Cl2CuN3

Mphure, Lebohang Theodora; Visser, Hendrik G.; Roodt, Andreas; Brink, Alice

doi:10.1515/ncrs-2014-9042

Cited by 1 publication

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“…On the one hand, a survey of the CSD revealed that, in the few known penta-coordinated [Zn(R-bpa)Br 2 ] complexes, the bpa ligand is bound to the central metal as mer -isomer. ,,,, On the other hand, even for a significantly broader class of compounds, namely, [M(R-bpa)X 2 ] complexes containing any transition metal M or any halogen ions X, the bpa fac -isomer was found relatively rarely in the solid state, with only a handful of structures in the literature. ,− …”

Section: Resultsmentioning

confidence: 99%

Structural Variety of Isopropyl-bis(2-picolyl)amine Complexes with Zinc(II) and Copper(II)

Juraj

Muratović

Perić

et al. 2020

Crystal Growth & Design

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A variety of structurally different complexes of the isopropyl-bis(2-picolyl)amine ( i Pr-bpa) ligand were prepared with ZnA2 and CuA2 salts (A = Br–, Br–/PF6 –, BF4 –/F–, ClO4 –). The choice of different counterion affected the stoichiometry, coordination number, geometry, and formation of geometrical isomers. Crystal structures of four Zn(II) complexes, namely, two monomers ( mer -[Zn( i Pr-bpa)Br 2 ] and fac -[Zn( i Pr-bpa)Br 2 ]), one F–-bridged dimer ([Zn 2 (μ-F) 2 ( i Pr-bpa) 2 ](BF 4 ) 2 ), and one ML 2 complex ([Zn( i Pr-bpa) 2 ](ClO 4 ) 2 ) were determined, and their solution structures were studied by NMR spectroscopy. For the ML 2 complex, relative stabilities of geometrical isomers were determined using density functional theory calculations. For Cu(II) complexes, five crystal structures were determined, namely, two monomers ([Cu( i Pr-bpa)Br 2 ] and [Cu( i Pr-bpa)(ClO 4 ) 2 (H 2 O)]), a Br–-bridged dimer ([Cu 2 (μ-Br)(Br) 2 ( i Pr-bpa) 2 ](PF 6 )), a F–-bridged coordination polymer ([Cu(μ-F)( i Pr-bpa)] n (BF 4 ) n × nCH 3 OH), and a cyclic, CO3 2–-bridged trimer ([Cu 3 (tri-μ-CO 3 )(ClO 4 ) 3 ( i Pr-bpa) 3 ](ClO 4 )). The different crystallographic structures of Cu(II) complexes are reflected in their different magnetic properties investigated by electron spin resonance spectroscopy and magnetic susceptibility measurements.

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