trans-Bis(dinitrogen)bis[1,2-bis(diphenylphosphino)ethane]molybdenum(0) is a coordination complex with the formula Mo(N2)2(dppe)2.

[1] Mo(N2)2(dppe)2 is an octahedral complex with idealized D2h point group symmetry.

[2] This length is close to the free nitrogen bond length, but coordination to the metal weakens the N-N bond making it susceptible to electrophilic attack.

This Mo(IV) compound is reduced by tin powder to [MoCl3(thf)3].

In this way, Mo(N2)2(dppe)2 serves as a model for biological nitrogen fixation.