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Research has been conducted on the cyclic organihydroborate zirconium monocyclopentadienyl complexes. The preparation of these complexes in diethyl ether has been carried out and the details are reported.

The complex Zr(9-BBN)(sub 4)[9-BBN=(mu-H)(sub 2)BC8H14}(sub 4) are synthesized via the reaction of K(9-BBN) with ZrCl(sub 4) in diethyl ether. The structure of the little compound is determined by X-ray and neutron single-crystal diffraction techniques.

Research has been conducted on the cyanide-bridged lanthanide-transition-metal arrays. The synthesis of these arrays has been carried out and the results indicate that lanthanide nitrates are strong electrolytes and that they dissociate completely in DMF solvent to form simple ions.

A series of alkaline earth−transition metal heterobimetallic complexes {(DMF)xM(μ-CN)yM*(CN)4−y}∞ [M = Ba: M* = Ni 1, M* = Pd 2, M* = Pt 3; M = Sr: M* = Ni 4, M* = Pd 5, M* = Pt 6; x = 3 or 4; y = 3 or 4] was prepared. Single-crystal X-ray diffraction analysis revealed that {(DMF)4Ba(μ-CN)3Ni(CN)}∞1, {(DMF)4Sr(μ-CN)3Ni(CN)}∞4, {(DMF)4Sr(μ-CN)3Pd(CN)}∞5, and {(DMF)4Sr(μ-CN)3Pt(CN)}∞6 form isostructural one-dimensional "ladder" arrays through isocyanide linkages (M-NC-M*), while {(DMF)3Ba(μ-CN)4Pd}∞2, and {(DMF)3Ba(μ-CN)4Pt}∞3 are two-dimensional puckered sheet like arrays. These bimetallic complexes can serve as effective precursors for the synthesis of supported bimetallic catalysts. It has been established that Ba−Pd/SiO2 and Sr−Pd/SiO2 catalysts, prepared from 2 and 5 loaded onto a silica support, delivered specific reaction rates in the hydrodechlorination of mono- and dichloro benzene that were over an order of magnitude greater than that achieved with conventional Pd/SiO2. A series of six alkaline earth−transition metal heterobimetallic complexes has been prepared. On the basis of single-crystal X-ray diffraction analyses, some of these compounds are one-dimensional "ladder" structures such as {(DMF)4Ba(μ-CN)3Ni(CN)}∞, while others, {(DMF)4Ba(μ-CN)4Pd}∞ for example, are two-dimensional array structures. The alkaline earth palladium complexes can serve as precursors for the synthesis of highly active heterogeneous hydrodechlorination catalysts. [ABSTRACT FROM AUTHOR]

Abstract: The gas phase hydrodechlorination (HDC) of chlorobenzene (CB), 1,2-dichlorobenzene (1,2-DCB) and 1,3-dichlorobenzene (1,3-DCB) has been investigated over Pd/SiO2 and a series of Ln-Pd/SiO2 prepared from the organometallic precursor{(DMF)10Ln2[Pd(CN)4]3}∞ where Ln=La, Ce, Sm, Eu, Gd and Yb; Pd loading=5%, w/w. Under identical reaction conditions, the following overall sequence of increasing initial fractional dechlorination has been established: Pd/SiO2

The complex Zr(9-BBN)4 [9-BBN = (µ-H)2BC8H14] has been synthesized via the reaction of K(9-BBN) with ZrCl4 in diethyl ether. The structure of the title compound has been determined by X-ray and neutron single-crystal diffraction techniques. Each 9-BBN ligand is coordinated to the Zr atom via two B-H-Zr bridges, and these metal-ligand bonding interactions are further augmented by three prominent C-H···Zr agostic interactions. Average molecular parameters derived from the neutron analysis: Zr-H = 2.051(8) Å, B-H = 1.286(7) Å, Zr···B = 2.409(6) Å, Zr-H-B = 87.7(4)°, H-Zr-H = 58.9(3)°. The Zr···H distances corresponding to the three C-H···Zr agostic interactions are 2.424(7), 2.663(8), and 2.551(7) Å. The fourth potential C-H···Zr interaction has a Zr···H distance [3.146(7) Å] that is too long to be considered in the agostic range. Single-crystal X-ray diffraction data were collected on an Enraf-Nonius Kappa CCD diffraction system, and neutron diffraction data were collected on the quasi-Laue diffractometer VIVALDI at the Institut Laue-Langevin; the final agreement factor for the neutron analysis is 6.52% for 2557 reflections with I > 2σ(I). [ABSTRACT FROM AUTHOR]