ISSN:
1572-8862
Keywords:
Hexanuclear zirconium cluster
;
pentanuclear zirconium cluster
;
cluster hydrogen atom
;
bromide
;
chloride
;
arsine
;
amine
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract Reduction of ZrBr4 with HSnBu3 yielded a blue solid. When this blue solid was treated with PMe3, a hexanuelear cluster [Zr6Br14H4( PMe3)4] (2) was isolated. Reaction of the blue solid with [PPh4]Br in CH2Cl2 resulted in the formation of a paramagnetic and unstable cluster anion, [Zr6Br18H5]2− (3′), which disproportionated to form a new cluster anion, [Zr6Br18H5]3− (4′) and some Zr(IV) species. Compounds containing 4′ can also be obtained from reaction of the blue solid with Br− in MeCN. Reduction of ZrCl4 with HsnBu3 gave a red–brown solid, and [Zr6Cl14H4(AsMe3)4] (9) and [Zr5Cl12H4(AsMe3)5](8) were obtained by reaction of the red–brown solid with AsMe3. No cluster compounds containing amine ligands were obtained in the reaction of the red–brown solid with amines; only compounds containing the [Zr6Cl18 H5]3− anion and ammonium cations were isolated. Altogether ten products were characterized by single crystal X-ray diffraction and where possible, by 1H NMR studies.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022629506670
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