Transition-metal-mediated activation of the heptaarsenide trianion: isolation of a diaryltetraarsenabutadienediide†
Abstract
Reaction of an ethylenediamine solution of K3As7 with the low-valent, low-coordinate cobalt(II) complex [Co(mes)2(PEt2Ph)2] yielded the novel dianionic species [Co(η3-As3){η4-As4(mes)2}]2− (1). The [η4-As4(mes)2]2− moiety present in 1 is a rare example of a group 15 analogue of a butadienediide.