Synthesis and Structure of a 1,2,4,5‐Tetraborinane

Stabilization of the B4C2 skeleton as a classical boron-carbon compound with cyclohexane structure has been achieved for the first time by introduction of electronically active dimethylamino groups. In the crystal, 2 adopts a chair conformation. Because they are electron deficient, compounds of the type (RB)4(CR′)2, R,R′ = H, alkyl, have carbaborane structures.