Unique Dispersion-Induced Tetrel Bond with Co-operative σ-hole-Induced Pnicogen Bond in the POCl-Acetone Heterodimer: Experimental Confirmation at Low Temperatures.

Both tetrel and pnicogen bonds are known to be induced through σ-/π-holes. This work reports computational and experimental evidence of the carbonyl carbon of acetone hosting a tetrel bond by rather electrostatic forces, for the first time, while phosphorus of POCl sustains pnicogen bonding via the σ-hole. Heterodimers of POCl with acetone (CHCOCH) have been isolated within inert gas matrixes of Ar and N at 12 K.