The reaction of Mo(O)(NBu(t))(OSiMe3)Cl or Mo(O)(NBu(t))(OSiMe3)2 with mesMgBr affords the imido complex [Mo(NBu(t))(mes)3(OSiMe3)] (2); the crystal structure of 2 indicates that the imido and the siloxy ligands are linear, the Mo-N bond of 1.786(10) angstrom being one of the longest reported to date for a linear molybdenum imido group.
Lai, R., Declercq, J.-P., Piasco, V., Belin, C., Ros, C., & Feneaudupont, J. (1993). Synthesis and Molecular-structure of (t-butylimido)tris(mesityl)(trimethylsiloxy)molybdenum(vi). Polyhedron, 12(20), 2513-2517. https://doi.org/10.1016/S0277-5387(00)83077-6 (Original work published 1993)