Synthesis, structure and magnetic properties of two complexes based on bis(maleonitriledithiolate)nickel(III)/copper(II) anion and 1-(4′-bromobenzyl)triphenylphosphinium

Syntheses, one-dimensional chain structures and magnetic properties for two molecular metals of bis(maleonitriledithiolate)nickel(III) anion and disubstituted benzyl triphenylphosphonium

“…S1 Table 5 for the purpose of knowing the effect of the substituent groups and their positions in phenyl ring on the structures of the molecular solids. It can be seen from Table 5 that when the substituted group on ortho-position on benzene ring was fixed, the change of the substituted one on para-position, results in the change of the dihedral angles of cation and the overlapping modes of anions, as well as the Ni· · ·Ni distance, and vice versa [16][17][18][19][20]35]. For example, when the R 2 is F atom, R 1 is changed from H, Cl to Br atom, the crystal system and space group of the molecular solids are changed in the following order: monoclinic (P2 1 /n) → triclinic (P−1) → monoclinic (P2 1 /n), the overlapping modes of anions are changed from Ni· · ·ring and Ni· · ·S → C· · ·ring → Ni· · ·S, and the Ni· · ·Ni distances are changed from 3.939, 4.057, 4.101Å to 7.206Å and 4.148Å.…”

“…Therefore, it is meaningful for the design and preparation of new counter-cations for adjust the overlap patterns of [Ni(mnt) 2 ] − anions in order to build a relationship between the intermolecular and its function. In recent years, we have systemically investigated the influence of derivatives of 2 or 4-substituted benzyl triphenylphosphonium ([2RBzTPP] + and [4RBzTPP] + , R = H, F, Cl, Br, NO 2 ) as multifunctional counter-cation of upon the overlapping mode of the neighboring [Ni(mnt) 2 ] − anion and the magnetic coupling of the molecular metals, which generally involve aromatic · · · stacking, weak coordinative forces, short-range interactions and hydrogen bonds [16][17][18][19][20]. With a view to extending our study in this field, we have obtained two molecular solids containing disubstituted benzyl triphenylphosphonium cations, [2F4BrBzTPP] [Ni(mnt) 2 [21,22].…”