Can BB triple bond be as potential proton acceptor: An ab initio study on unusual intermolecular T-shaped X-H···π interactions between OCBBCO and HF, HCl, HCN or H2C2

The unusual T-shaped X-H···π hydrogen bonds are found between the BB triple bond and HF, HCl, HCN and H2C2 using abinitio method, accompanied by the BB bond contraction.