Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 16, 2004
Previous Article Next Article

Dichlorosilane–dimethyl ether aggregation: a new motif in halosilane adduct formation

Author affiliations

Abstract

The crystal structures of (H3C)2O, H2SiCl2 and an adduct of these were determined by low-temperature X-ray crystallography on crystals grown in situ at low temperatures on a diffractometer. The adduct of (H3C)2O and H2SiCl2 has the composition [(H3C)2O·H2SiCl2]2 and contains a four-membered Si2O2 ring, with the Cl atoms pointing to the outside and the Si–H functions pointing to the inner side of the ring. The Si2O2 ring has two longer and two shorter Si⋯O bonds and thus deviates from a square. Quantum chemical calculations give a geometry for [(H3C)2O·H2SiCl2]2 which has D2h symmetry and allow to obtain an estimate for the adduct formation energies, which are −13.4 kJ mol−1 for the formation of the mono adduct [(H3C)2O + H2SiCl2 → (H3C)2O·H2SiCl2], −14.4 kJ mol−1 for the dimerization of two mono adducts {(H3C)2O·H2SiCl2 → [(H3C)2O·H2SiCl2]2} and −41.2 kJ mol−1 for the reaction 2 (H3C)2O + 2 H2SiCl2 → [(H3C)2O·H2SiCl2]2. The results are used to rationalize the strongly reduced reactivity of H2SiCl2 towards nucleophilic substitution reactions in (H3C)2O at low temperatures.

Graphical abstract: Dichlorosilane–dimethyl ether aggregation: a new motif in halosilane adduct formation

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 16 Apr 2004, accepted on 29 Jun 2004 and first published on 21 Jul 2004


Article type: Paper
DOI: 10.1039/B405684A
Citation: Dalton Trans., 2004, 2578-2581
  •   Request permissions

    Dichlorosilane–dimethyl ether aggregation: a new motif in halosilane adduct formation

    K. Vojinović, U. Losehand and N. W. Mitzel, Dalton Trans., 2004, 2578
    DOI: 10.1039/B405684A

Search articles by author