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- Title
A Family of Multiply Bonded Dimolybdenum Boraamidinates with the Formal Mo−Mo Bond Orders of 3, 4, 4.5, and 5.
- Authors
Lu, Duan‐Yen; Kuo, Ting‐Shen; Tsai, Yi‐Chou
- Abstract
A boraamidinato ligand [PhB( N-2,6- iPr2C6H3)2]2− was employed to stabilize a new family of multiply bonded dimolybdenum complexes [MoCl(μ-κ2-PhB( N-2,6- iPr2C6H3)2)]2 ( 4) and [Mo(μ-κ2-PhB( N-2,6- iPr2C6H3)2)]2 n− ( n=0 ( 5), 1 ( 6), 2 ( 7)), with the respective formal Mo−Mo bond orders of 3, 4, 4.5, and 5. Each metal center in 5- 7 is two-coordinate with respect to the ligands. Of particular interest is the quadruply bonded dimolybdenum complex 5, featuring an unprecedented angular conformation. The bent Mo2N4 core of 5 distorts toward planarity upon reduction. As a result, compound 7 features a planar Mo2N4 core, while that of 6 is still bent but less significantly than that of 5. Additionally, the Mo−Mo bond lengths of 4- 7 systematically decrease as the valency of the central Mo2 units decreases. Complex 7 features the shortest Mo−Mo bond length (2.0106(5) Å) yet reported.
- Subjects
LIGANDS (Chemistry); LIGAND exchange reactions; COORDINATION compounds; CHEMICAL bonds; POLARITY (Chemistry)
- Publication
Angewandte Chemie International Edition, 2016, Vol 55, Issue 38, p11614
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201605543