Bis(dichlorosilyl)methylamine – Synthesis, Crystal Structure, and Conformational Analysis in the Gas Phase

✍ Scribed by Holger Fleischer; Donald C. McKean; Simon Parsons; Michael Bühl

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: German
• Weight: 126 KB
• Volume: 625
• Category: Article
• ISSN: 0372-7874
• DOI: 10.1002/(sici)1521-3749(199902)625:2<313::aid-zaac313>3.0.co;2-q

✦ Synopsis

A straightforward preparation has been found for bis(dichlorosilyl)methylamine, (SiHCl 2 ) 2 NMe (1), involving reaction between H 2 NMe and an excess of SiHCl 3 , dissolved either in pentane or THF at 253 K. 1 and a side-product, 1,3,5-trichloro-2,4,6-trimethylcyclotrisilazane, (±SiHCl±NMe±) 3 (2), were identified by elemental analysis, mass spectrometry and 1 H-NMR-spectroscopy. Some physical, NMR-and IR spectroscopical properties of 1 were determined. The molecular and crystal structure of 1 was investigated by single crystal X-ray diffraction. Selected structural parameters: r(Si±N) 169.7(5), r(Si±Cl) 203.1(2)±204.4(2), r(C±N) 150.0(8) pm; a(SiNSi) 123.6(3), a(SiNC) 118.3(4)/ 118.0(4)°. Ab initio force field data and infrared intensities were calculated for four conformers of 1. Comparison of the observed and calculated IR spectra favours the two structures found ab initio provided that their actual abundancies are different from those calculated.