ISSN:
1572-8862
Keywords:
Quadruple bond
;
alkynyl
;
conjugation
;
disorder
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract The reaction betweenM 2Cl4(PMe3)4 (M = Mo, W) and four equivalents of LiCCR (R = Me,i-Pr,t-Bu, SiMe3, Ph) in dimethoxyethane solution yields alkynyl-substituted, quadruply bonded complexes of the type M2(CCR )4(PMe3)4 in 10–90% yield. The electronic-absorption and1H-,13 13C-, and31P-NMR spectroscopic data for these dimetallapolyyne complexes indicate that they are uncontaminated by chloride-containing impurities, and that they possess theD 2d geometry expected of compounds of the M2X4L4 type. A single-crystal X-ray diffraction study of Mo2(CCPr i )4(PMe3)4 confirms this latter conclusion, and also reveals that the Mo2 core of the complex is three-way disordered within the ordered quasi-cubic array of ligating atoms.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01165494
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