Syntheses and structures of W2(µ-Cl)3Cl6– and W2(µ-Cl)2Cl82–, new d2–d2 confacial and edge-sharing bioctahedral ditungsten compounds, and a convenient synthesis of W2(µ-Cl)3Cl62–
Abstract
(NR4)W2Cl9 and (NR4)2W2Cl10, prepared by addition of NR4Cl (R = alkyl) to (WCl4)x powder in CH2Cl2, have confacial [WW, 2.689(1) Å] and edge-sharing bioctahedral [WW, 2.792(1) Å] structures, respectively, as NBnEt3+ salts, and convert with added NR4Cl to (NR4)2W2Cl9 and (NR4)WCl6 and eventually (NR4)2WCl6; (NR4)W2Cl9 can be converted to (NR4)2W2Cl10 by NR4Cl at –30 °C.