Scheme 29 Reaction of L4 with a Ni
0 precursor in the presence of CO gas leads to a dimeric
species which is schematically drawn to emphasize the new C–C bond [113]
Scheme 30 Bifunctional Si–H bond activation by a L4Ni
0
(PPh 3 ) complex is thought to proceed
through a concerted transition state via ligand-to-ligand hydride transfer [114]
C7
N1
P2
P3
Ni1
P1
H1
Si1
Fig. 21 X-ray crystal structure of the hydrosilazane complex showing the σ-coordinated Si-H bond
(thermal ellipsoids at 50% probability). Hydrogen atoms (except the hydride) and phenyl groups on
the phosphorus atoms (except for the bound carbon atoms) are omitted for clarity [114]
Scheme 31 Schematic representation of the silane scrambling experiment [114]
Metal-Ligand Cooperation at Phosphine-Based Acceptor Pincer Ligands
61
0 precursor in the presence of CO gas leads to a dimeric
species which is schematically drawn to emphasize the new C–C bond [113]
Scheme 30 Bifunctional Si–H bond activation by a L4Ni
0
(PPh 3 ) complex is thought to proceed
through a concerted transition state via ligand-to-ligand hydride transfer [114]
C7
N1
P2
P3
Ni1
P1
H1
Si1
Fig. 21 X-ray crystal structure of the hydrosilazane complex showing the σ-coordinated Si-H bond
(thermal ellipsoids at 50% probability). Hydrogen atoms (except the hydride) and phenyl groups on
the phosphorus atoms (except for the bound carbon atoms) are omitted for clarity [114]
Scheme 31 Schematic representation of the silane scrambling experiment [114]
Metal-Ligand Cooperation at Phosphine-Based Acceptor Pincer Ligands
61