Nickel 110-plane

It is interesting to compare an order of magnitude estimate of the experimental value of the equilibrium constant for this reaction (11) to those obtained from the work of Bengaard et al.(26) at nickel step defect sites and at nickel planes. Experimentally, the onset of carbon formation was found (11) to be at partial pressures of H2, H2S, and... 

Beebe T P, Goodman D W, Kay B D and Yates J T Jr 1987 Kinetics of the activated dissociation adsorption of methane on low index planes of nickel single crystal surfaces J. Chem. Phys. 87 2305... 

In bivalent nickel, palladium, or platinum there are eight electrons in the outer d subshell. Putting them two to an orbital, they occupy a minimum of four of the five d orbitals, leaving only one d orbital available for bond formation through combination with s, px, py, and pz of the next outer shell. It is found that only four strong bond orbitals can be formed. These four lie in a plane and are directed towards the four comers of a... 

If the BF2 groups in Ni(dmg-BF2)2 are substituted by BPh2 units (122), the complex also adopts the saddle-shaped conformation of type D (Fig. 32), in which the two dimethylglyoxime fragments are bent down from the N4 plane with a dihedral angle of about 27° between the two least-squares planes of the dioxime units. The coordination geometry around the nickel ion is distorted square-pyramidal, but there are no intermolecular Ni Ni interactions [167]. 

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