Anthony KERMAGORET - THESES ET MEMOIRES DE L'UDS

Table 1 Selected bond distances (Å) and bond angles [°] in 13
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Ni-P1 2.2167(4)
Ni-C10 1.887(2)
Ni-P2 2.1665(4)
Ni-O1 1.905(1)
P2-C1 1.768(2)
C1-C2 1.363(2)
C2-O1 1.318(2)
C2-C3 1.497(2)
O2-H1 2.283(2)
C10-Ni-P1 93.67(5)
C10-Ni-P2 92.36(5)
O1-Ni-P2 85.78(3)
O1-Ni-P1 87.88(3)
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Table 2 Hydrogen bonding in 13 (Å and °)
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Donor—H···Acceptor D—H H···A D···A D—H···A
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C1—H···O2 0.95 2.28 2.813(2) 114
C4—H4···O1 0.95 2.34 2.676(2) 100
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Chapitre VI
We have described previously the nickel complexes 14 which display an
intramolecular bonding interaction between the oxygen atom coordinated to the metal centre
and an hydrogen atom of an ortho-substituent on the aromatic ring of the P,O ligand. 58,60 This
interaction modifies sufficiently the electronic density at the metal to shift the mass
distribution of the oligomers formed toward the desired, shorter chain α-olefins.
Me H
O
C
H
Ph 2
P
O
Ni
13
Ph
PPh 3
HC
X
Ph 2
P
O
Ni
Ph
PPh 3
H X = O, NMe, NPh
14
8