The First Heteroallyl Metal Complexes of Arsenic with the Coordination Number 2

Abstract

Isotypical structures and great stability characterize the heteroallyl complexes 1 and 2 in which As is dicoordinate. The synthesis of the complexes from 3 by deprotonation with M(N(SiMe3)2)2 should also be transferrable to other heteroallyl systems.

Synthesis of a Molecule with Four Different Adjacent Pnictogens

“…In the group of Niecke, studies on [R‐NPN‐R′] − (e. g. R=Mes*=2,4,6‐tri‐ tert ‐butylphenyl) anions were conducted, revealing the formation of dimeric structures when one less bulky substituent was used . The first example of an [R‐NAsN‐R] − (R=2,6‐diisopropylphenyl) was reported by Roesky et al . while in our group the preparation of [R‐NSbN‐R] − and [R‐NBiN‐R] − (R=Ter=2,6‐bis(2,4,6‐trimethylphenyl)phenyl) was devised only recently …”

“…In the group of Niecke, studies on [R-NPN-R'] À (e.g .R= Mes* = 2,4,6-tri-tert-butylphenyl) anions were conducted, revealing the formation of dimerics tructures when one lessb ulky substituent was used. [8,9] The first example of an [R-NAsN-R] À (R = 2,6-diisopropylphenyl) was reported by Roesky et al [10] while in our group the preparation of [R-NSbN-R] À and [R-NBiN-R] À (R = Te r = 2,6bis(2,4,6-trimethylphenyl)phenyl) was devised only recently. [11] The heavierc ongeners featuring Pa toms with bulky substituents, [R-PPP-R] À and [R-PAsP-R] À ,w erei nvestigated by the groupso fL erner, [12] Jutzi, [13] Scheer, [14,15] and Wright.…”

Chemistry of pnictogen(iii)–nitrogen ring systems

“…21 Roesky et al prepared the cyclodiars(III)azane [DippN(H)As(m-NDipp)] 2 (8, E = As) by treatment of DippNHLi with AsCl 3 in a 3 : 1 molar ratio (eqn (2)). 22 This method was later used to produce the first structurally characterized cyclodibism(III)azane (8 E = Bi). 23 Burford and coworkers have extended this synthesis to the entire congeneric series of cyclic bis(amido)dipnict(III)azanes (8, E = P, As, Sb, Bi) (type II) and showed that the combination of one equivalent of LiNH t Bu and two equivalents of DippNHLi facilitates the isolation of 8.…”

The sensitive, anion-selective detection of arsenate with poly(allylamine hydrochloride) by single particle plasmon-based spectroscopy

“…Despite the fact that a HAsO 4 2− /H 2 AsO 4 − mixture (pK a = 6.76) is dominant under typical conditions, only H 2 AsO 4 − is shown in the schematic representation. It has been reported that the dihydrogen arsenate anion has an affinity for amine groups (-NH 2 ), via hydrogen-bond formation [23,24] and that arsenic has a tendency to form two-coordinated metal complexes with amine groups [25].…”