Decaethyl‐2,6,8,10‐tetracarba‐ nido ‐decaboran(10) – Herstellung, Struktur im festen Zustand und Stabilität (1)

Decaethyl‐2,6,8,10‐tetracarba‐ nido ‐decaborane(10) – Preparation, Structure in the Solid State, and Stability [1] The title compound 6 , prepared in two steps from the pentaethyl‐1,5‐dicarba‐ closo ‐pentaborane(5) ( 1 ), is characterized at 103 K as the low‐temperature solid phase LT‐6 by a single‐crystal X‐ray structure analysis; 6 reacts with alkali metals (K, Cs) to form the C 4 B 6 Et 10 dianion ( 6 2– ) which is easily oxidized to 6 (e.g. with I 2 , FeCl 2 , HgCl 2 ). Ab initio MO and IGLO calculations of compound 6 have been carried out.