Nickel tris 2- phenyl

The reaction in Eq. (22) is an example of the complete destruction of the original cluster the amine ligands on tin were replaced by tri(phenyl)siloxy groups with quantitative formation of the amine Me2Si[NtBu(H)]2, but the nickel-tin bonds are lost and bond fission was observed. Besides the formation of elemental tin, the di-nuclear complex [(Ph3Si 0)2Sn]2 was obtained as a white crystalline product and characterized unambiguously by an X-ray structure determination. 

NiO,2P4C 3gHg4, Nickel(0), tetrakis(iso-propyl phosphite)-, 28 101 NiO,2P4C 72H40, Nickel(0), tetiakis(tri-phenyl phosphite)-, 28 101 NiPgCiiHj, Nickel(0), bis[l,2-... 

Nickel and palladium react with a number of olefins other than ethylene, to afford a wide range of binary complexes. With styrene (11), Ni atoms react at 77 K to form tris(styrene)Ni(0), a red-brown solid that decomposes at -20 °C. The ability of nickel atoms to coordinate three olefins with a bulky phenyl substituent illustrates that the steric and electronic effects (54,141) responsible for the stability of a tris (planar) coordination are not sufficiently great to preclude formation of a tris complex rather than a bis (olefin) species as the highest-stoichiometry complex. In contrast to the nickel-atom reaction, chromium atoms react (11) with styrene, to form both polystyrene and an intractable material in which chromium is bonded to polystyrene. It would be interesting to ascertain whether such a polymeric material might have any catal3dic activity, in view of the current interest in polymer-sup-ported catalysts (51). 

Addition a to a cyano group Benzyltriethylammonium chloride, 239 Nickel, 197 Addition a to halogen Diiodomethane-Samarium, 113 Fluoromethyl phenyl sulfone, 135 Tris(dimethylamino)sulfonium difluo-rotrimethylsilicate, 336 Addition a to oxygen... 

The steric hindrance introduced by bulky ligands [e.g., tri(o-phenyl-phenyl)phosphite] has the effect that the ethylene molecule is unable to coordinate to the nickel atom and mainly COD is formed. 

Some iron and nickel cyanide and carbonyl complexes have been reported as models of the [FeNi]-hydrogenase enzymes. The preparation and structures of the trigonal bipyramidal nickel and iron complexes with the tetradentate ligands tris(2-phenylthiol)phosphine (PS3) and tris(3-phenyl-2-thiophenyl)phosphine (PS3 ) have been reported [70, 71]. The nickel carbonyl complex [Ni(PS3 )(CO)] exhibits vco at 2029 cm compared with the value of 1940 em" for the iron earbonyl complex [Fe(PS3 )(CO)]. Both of these complexes lose CO upon oxidation. The use of cyanide in place of carbon monoxide allows for the preparation of both [Fe (PS3)(CN)] and [Fe (PS3 )(CN)] eomplexes. The IR properties of... 

When a metal ion such as nickel (II) is absent, thiazoles and mercaptals are formed. Such reactions have been carried out in which the diketone was biacetyl, 2,3-pentanedione, 2,3-octanedione, l-phenyl-l,2-propane-dione, and 1,2-cyclohexanedione (51). In like manner, the tris complexes of W,W -dimethyl-2,3-butane diimine with iron(II), cobalt(II), and nickel(II) may be prepared from methylamine and biacetyl when the appropriate metal ion (27j 28j 41) is present. Replacing methylamine with hydroxylamine causes the formation of a-dioximes (13). 

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