Polyatomic anion versus acetonitrile in coordinating ability: structural properties of AgX-bearing 1,4-bis(2-isonicotinoyloxyethyl)piperazine (X− = NO3 −, CF3SO3 −, ClO4 −, BF4 −, and PF6 −)

Abstract

Type studies on competitive polyatomic anion versus acetonitrile coordination in the self-assembly of a series of [Ag 2 -, and PF 6 -; m = 0, 2; n = 0, 2, 4; bip = 1,4-bis(2-isonicotinoyloxyethyl)piperazine) were carried out. Each bip spacer acts as an N 4 tetradentate ligand and is linked to four silver(I) centers through two pyridine and two piperazine moieties, producing a double strand consisting of two 20-membered ring units. The coordinating environment around the silver(I) center is subtly determined by the competition of the polyatomic anions with acetonitrile, that is, by the AgÁÁÁNCCH 3 versus AgÁÁÁX interactions. The coordinating ability of acetonitrile is inversely proportional to the order of the coordination ability of the Hoffmeister series of polyatomic anions, NO 3 -) CF 3 SO 3 -[ ClO 4 -[ BF 4 -) PF 6 -.

Solvating lithium and tethering aluminium using di-coordination-strength anions for low-temperature lithium metal batteries

“…Therefore, the perchlorate (ClO 4 − ) with a moderate coordination strength for Al 3+ is selected as a benchmark to evaluate anion coordination strength. According to the literature, the sequence of anion coordination strength follows FSI − < ClO 4 − < NO 3 − , 61,62 and anion coordination competition results show the variation of electron cloud around Al 3+ . To this end, a DMF solution containing Al(ClO 4 ) 3 is prepared and then added in equal molar LiNO 3 and LiFSI to monitor the 27 Al and 17 O signals.…”

Synthesis, Structural Characterization, Photophysical Properties, and Antibacterial Assessment of Silver(I)-Thione Coordination Polymers Based on a Competition between Nitrate Anion and Coanions CF3SO3–, ClO4–, BF4–, PF6–, and SbF6–

“…In this preparation, there is a competition between the coordination ability of the nitrate and triflate anions. Despite the coordination ability expected for both anions, − there is no evidence to confirm the coordination of these anions simultaneously to the silver atoms. This observation can be rationalized by the fact that the product of reaction 2 depends highly on the methanol/water ratio and solubility of the silver salts in this solvent.…”

“…In the IR spectrum of compound 5 , a peak at 560 cm –1 and a broad band at 842 cm –1 are assigned to the υ 4 (T 1u ) and υ 3 (T 1u ) vibrations of the PF 6 – , respectively. , A peak at 662 cm –1 is assigned to the υ 3 (T 1u ) vibration of SbF 6 – . The IR spectrum of coordination polymers 5 and 6 shows a band at 1384 cm –1 that is assigned to the NO 3 – anion. , …”