3 research outputs found
One-Pot Synthesis of Mo<sup>0</sup> Dinitrogen Complexes Possessing Monodentate and Multidentate Phosphine Ligands
No full textMo<sup>0</sup> dinitrogen complexes bearing electron-rich
mono-
and bidentate phosphines can be synthesized in good yields from inexpensive
and readily accessible MoCl<sub>5</sub> via a one-step mild reduction
with Mg metal. <i>trans</i>-[(N<sub>2</sub>)<sub>2</sub>Mo(PMePh<sub>2</sub>)(PPh(CH<sub>2</sub>CH<sub>2</sub>PPh<sub>2</sub>)<sub>2</sub>)] can also be obtained via this strategy. However,
in the presence of tri- and tetradentate ligands that are sterically
restrictive, the analogous reduction leads to either (η<sup>6</sup>-arene) formation or [Mo(multidentate phosphine)<sub><i>m</i></sub>]<sub><i>n</i></sub> oligomer complexes
that have no dinitrogen ligands. One such η<sup>6</sup>-arene
complex, where the Mo<sup>0</sup> center is ligated by 1,1,1-tris(diphenylphosphinomethyl)ethane,
was isolated and characterized via X-ray crystallography
One-Pot Synthesis of Mo<sup>0</sup> Dinitrogen Complexes Possessing Monodentate and Multidentate Phosphine Ligands
No full textMo<sup>0</sup> dinitrogen complexes bearing electron-rich
mono-
and bidentate phosphines can be synthesized in good yields from inexpensive
and readily accessible MoCl<sub>5</sub> via a one-step mild reduction
with Mg metal. <i>trans</i>-[(N<sub>2</sub>)<sub>2</sub>Mo(PMePh<sub>2</sub>)(PPh(CH<sub>2</sub>CH<sub>2</sub>PPh<sub>2</sub>)<sub>2</sub>)] can also be obtained via this strategy. However,
in the presence of tri- and tetradentate ligands that are sterically
restrictive, the analogous reduction leads to either (η<sup>6</sup>-arene) formation or [Mo(multidentate phosphine)<sub><i>m</i></sub>]<sub><i>n</i></sub> oligomer complexes
that have no dinitrogen ligands. One such η<sup>6</sup>-arene
complex, where the Mo<sup>0</sup> center is ligated by 1,1,1-tris(diphenylphosphinomethyl)ethane,
was isolated and characterized via X-ray crystallography
Efficient Carbene and Carbyne Formation in Molybdenum(0) and Tungsten(0) Dinitrogen Complexes
No full textZerovalent group
6 dinitrogen phosphine complexes react with 3,3-diphenylcyclopropene
to give vinylcarbyne hydride complexes that have been characterized
crystallographically. Computational studies indicate that the observed
products resulted from the α-migration and rearrangement of
an initially formed vinylcarbene
