Synthesis, structure, and magnetic properties of bis (3-amino-2-chloropyridinium)tetrahalocuprate(II) [halide = Cl or Br]

Abstract

The reaction of CuX 2 (X= Cl or Br) with 3-amino-2-chloropyridine in aqueous acids (HX; X= Cl or Br) yields compounds bis(3-amino-2-chloropyridinium) tetrachlorocuprate (II) and bis(3amino-2-chloropyridinium) tetrabromocuprate (II). Both compounds have been characterized by IR, powder X-ray diffraction, single-crystal X-ray diffraction and temperature dependent magnetic susceptibility. The compounds are isomorphous and exhibit weak antiferromagnetic interactions.

Crystal structure and spectroscopic study of bis-tetrapropylammonium hexachlorodicuprate(II), [N(C3H7)4]2Cu2Cl6

“…The Cu-Cl bond distances are in the range of 2.2046(6)-2.3231(6) Å for the Cu2Cl6 2-anion. These bond distances fall in the range reported previously for compounds containing Cu-Cl bonds [24][25][26][27][28]. The Cl-Cu-Cl angles are present in two distinguished sets.…”

Transition metal complexes of 2-amino-3,5-dihalopyridines: Syntheses, structures and magnetic properties of (3,5-diCAPH)2CuX4 and (3,5-diBAPH)2CuX4

“…In general, in compounds with similar structures, the magnetic exchange in the bromide complex is significantly greater than in the chloride. 4f, 17,22 While the relationship between the two-halide pathway parameters and the magnetic exchange has not been quantified, some general trends have been observed. 2 The magnitude of the exchange is larger for shorter interhalide distances (d), for larger values of Cu-X ◊ ◊ ◊ X (q) and for values of t near 0 • and 180 • .…”

“…4) 16 and observed in other compounds of this type. 17 Close contacts are observed between Cl1 and Cl23…”

A copper-based 2D hybrid perovskite solar absorber as a potential eco-friendly alternative to lead halide perovskites

“…4 Hybrid organic–inorganic perovskites (HOIPs) have inspired great interest for scientific study and device applications due to their structural features as well as their optical, electronic, and magnetic properties. 5–9 They are an emerging class of optoelectronic materials with suitable properties for optoelectronic applications such as light-emitting diodes and solar energy conversion. 10,11 Such desirable properties include tunable band gaps, 12 high charge carrier mobilities, 13 defect tolerance 14 and facile solution processability.…”