Not that they haven't looked. In the early 1980s, chemists searched for--but couldn't find--evidence of this type of bond after some theorized it should exist. The bond occurs between two heavy atoms with a hydrogen atom, which is light, in the middle. Normally, chemical bonds only happen when the bonding reduces the potential energy of the system. In this case, the potential energy of the system is higher after bonding. Still, the bond appears because something called the vibrational zero point energy decreases so much, it stabilizes the system. The bond is called a vibrational bond.