23777-40-4Relevant articles and documents
Tolman, C. A.,Seidel, W. C.,Gerlach, D. H.
, p. 2669 - 2676 (1972)
Capping nido-Nonagermanide Clusters with M-PPh3 and Dynamics in Solution: Synthesis and Structure of closo-[(Me3Si)3Si]3Et[Ge9 M](PPh3) (M = Ni, Pt)
Frischhut, Sabine,Kaiser, Felix,Klein, Wilhelm,Drees, Markus,Kühn, Fritz E.,F?ssler, Thomas F.
, p. 4560 - 4567 (2019/01/08)
In this work, cluster expansion of nine-atomic germanium clusters with nickel and platinum atoms is reported. The compounds [(Me3Si)3Si]3Et[Ge9Ni](PPh3) and [(Me3Si)3Si]3Et[Ge9Pt](PPh3) are characterized by NMR spectroscopy, elemental analysis, and single crystal X-ray structure analysis. The latter represents the first intermetalloid Ge-Pt cluster with a platinum atom as part of a deltahedron. So far, only one compound of this type has been reported for the homologous Pd. Hence, with these new compounds, metal-coordinated deltahedral Ge9 clusters are now known for the whole triad of group 10 elements. The cluster compounds are accessible by treating [(Me3Si)3Si]3EtGe9 with η2-ethylene-bis-(triphenylphosphine)-nickel(0) and η2-ethylene-bis-(triphenylphosphine)-platinum(0), respectively, in toluene. The crystal structure determination reveals ten-vertex-closo-[Ge9M]-cluster cores (M = Ni, Pt) bearing five exo-bonded ligands. Unlike the nine-vertex-cluster [(Me3Si)3Si]3EtGe9, the penta-functionalized platinum containing cluster compound [(Me3Si)3Si]3Et[Ge9Pt](PPh3) does not show fluctuating behavior in solution over a wide temperature range on the NMR time scale, whereas the [(Me3Si)3Si]3Et[Ge9Ni](PPh3) shows highly dynamic processes in solution at ambient temperature.
Isomerization of a vinylcyclobutene to a cyclohexadiene: A nickel(I)-promoted rearrangement
Choi, Heajin,Hershberger, James W.,Pinhas, Allan R.,Ho, Douglas M.
, p. 2930 - 2936 (2008/10/08)
The nickel-promoted isomerization of a 3-vinylcyclobutene to the corresponding 1,4-cyclohexadiene was studied by using (PPh3)2Ni(C2H4) as the nickel source. Through the use of chemical and electrochemical experiments, it was determined that nickel(I) and not nickel(0) promotes this isomerization reaction at room temperature. The corresponding platinum-vinylcyclobutene complex 4 has been characterized by a single-crystal X-ray diffraction study: C46H42O4P2Pt, monoclinic, P21/n, with a = 10.774 (1) ?, b = 20.281 (4) ?, c = 18.297 (2) ?, β = 97.37 (1)°, Z = 4, R(F) = 0.0378, and Rw(F) = 0.0371.