Anthony KERMAGORET - THESES ET MEMOIRES DE L'UDS

Table 2. Selected Bond Lengths (Å) and Angles (deg) in complex 22
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Ni-P 2.304(1) P-O 1.626(3)
Ni-N 2.005(3) O-C6 1.454(6)
Ni-Cl1 2.217(2) C5-C6 1.505(6)
Ni-Cl2 2.227(1) C5-N 1.350(5)
P-C7 1.865(5) P-C11 1.860(5)
N-Ni-P 92.2(1) N-Ni-Cl1 102.9(1)
Ni-P-O 105.9(1) N-Ni-Cl2 108.3(1)
P-O-C1 118.8(2) Cl1-Ni-Cl2 123.47(5)
O-C1-C2 112.1(3) Cl1-Ni-P 112.74(5)
C1-C2-N 116.8(4) Cl2-Ni-P 111.77(5)
C2-N-Ni 122.5(3)
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Chapitre IV
Complex 18 has a dinuclear structure with pentacoordinated metal centers and six-membered
ring chelates. The cisoid coordination of the two pyridine functions with respect to the Ni-Ni
axis makes the structure non centrosymmetric but it possesses a C2 symmetry axis passing
through Cl2 and Cl3. The coordination geometry around the metals is distorted square-
pyramidal, with the square base being formed by N and the three chlorides (Scheme 2). The
Ni atom is out of this plane by 0.3777(1) Å.
Figure 2. ORTEP view of the molecular structure of 18 (ellipsoids enclose of 50% electronic
density, only the phenyl ipso carbons are shown and the H atoms are omitted for clarity).
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