The molecular structure of [Ta(NMe2)5] has been studied by gas-phase electron diffraction. Attempts were made to fit two models, each containing planar C2-N-Ta groups, to the experimental data. In model I, the TaN5 core was given a pyramidal geometry of C2v symmetry, while in model II it was assigned a trigonal bipyramidal structure, i.e. D3h symmetry. I gave the best fit to the experimental data. From model I the following values were obtained: r(g)(C-H) = 1.120 (10) angstrom, r(g)(Ta(1)-N(6)) = 1.937 (25) angstrom [N(6) is on the C2 axis], r(g)(Ta(1)-N(2)) = 2.040 (6) angstrom [N(2) is one of the four basal nitrogen atoms], r(g)(C-N) = 1.463 (5) angstrom, and angle N(6)-Ta(1)-N(3) = 116.2 (12)-degrees. Angle C-N-C = 110.1 (11)-degrees, angle N-C-H was held constant at 112.0-degrees, the angles in the base of the C2v pyramid were angle N(2)-Ta(1)-N(3) = 69.4 (31)-degrees, angle N(2)-Ta(1)-N(5) = 87.8 (36)-degrees, and angle N(2)-Ta(1)-N(4) = 127.6 (24)-degrees.

ChemInformVolume 19, Issue 41 Physical Organic Chemistry ChemInform Abstract: Gas-Phase Electron Diffraction Study of Tetrakis(dimethylamido)zirconium(IV), Zr(NMe2)4. K. HAGEN, K. HAGEN Dep. Chem., Univ. Reading, Whiteknights, Reading, Berkshire RG6 2AD, UKSearch for more papers by this authorC. J. HOLWILL, C. J. HOLWILL Dep. Chem., Univ. Reading, Whiteknights, Reading, Berkshire RG6 2AD, UKSearch for more papers by this authorD. A. RICE, D. A. RICE Dep. Chem., Univ. Reading, Whiteknights, Reading, Berkshire RG6 2AD, UKSearch for more papers by this authorJ. D. RUNNACLES, J. D. RUNNACLES Dep. Chem., Univ. Reading, Whiteknights, Reading, Berkshire RG6 2AD, UKSearch for more papers by this author K. HAGEN, K. HAGEN Dep. Chem., Univ. Reading, Whiteknights, Reading, Berkshire RG6 2AD, UKSearch for more papers by this authorC. J. HOLWILL, C. J. HOLWILL Dep. Chem., Univ. Reading, Whiteknights, Reading, Berkshire RG6 2AD, UKSearch for more papers by this authorD. A. RICE, D. A. RICE Dep. Chem., Univ. Reading, Whiteknights, Reading, Berkshire RG6 2AD, UKSearch for more papers by this authorJ. D. RUNNACLES, J. D. RUNNACLES Dep. Chem., Univ. Reading, Whiteknights, Reading, Berkshire RG6 2AD, UKSearch for more papers by this author First published: October 11, 1988 https://doi.org/10.1002/chin.198841062AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume19, Issue41October 11, 1988 RelatedInformation