SEARCH Articles Figures Tables M—H—M bridge bonding. Two metal hybrids and the H Is overlap in the same region of space. Filling the resulting combination with two electrons gives the two-electron three-center bond proposed for these systems. [Publishers Imprint] See Also: M—H—M bridge bonding. Two metal hybrids and the H Is overlap in the same region of space. Filling the resulting combination with two electrons gives the two-electron three-center bond proposed for these systems.