Skip to content

Research at St Andrews

Zwitterionic Alkali-Metal Silanides of Tripodal Ligand Geometry: Synthesis, Structure, and Lewis Acid-Base Chemistry

Research output: Contribution to journalArticle

Author(s)

Vidura D. Thalangamaarachchige, Hui Li, David B. Cordes, Daniel K. Unruh, Clemens Krempner

School/Research organisations

Abstract

A unique family of zwitterionic alkali-metal silanides of general formula [Si(SiMe2OR)3M] (M-3), where M = Li, Na, K and R = CH2CH3 (M-3b), CH(CH3)2 (M-3c), CH2CH(CH3)2 (M-3d), CH2CH2OSCH3 (M-3g), CH2CH2N(CH3)2 (M-3h), have been synthesized and their structures fully characterized. Compounds M-3 were prepared from reactions of the corresponding alkali-metal alkoxides, R′OM (R′ = But, Bui M = Li, Na, K) with the silanes Si(SiMe2OR)4 (2a-h), where R = CH2CH3 (b), CH(CH3)2 (c), CH2CH(CH3)2 (d), CH2CH2OSCH3 (g), CH2CH2N(CH3)2 (h), via selective Si-Si bond cleavage. Analysis of the X-ray data of Li-3a-e,g, Li-h, Li-4, Na-3a-c,e,f,h, and K-3b,d,e,g revealed two major structural motifs in the solid state: infinite chain type and monomeric zwitterions. The reaction of Si(SiMe2OCH2CH3)3Li (Li-3b) with BPh3 in THF gave the zwitterionic Lewis acid-base complex Ph3BSi(SiMe2OCH2CH3)3Li·THF (Li-5b). Reactions of W(CO)6 with Li-3b-d and Na-3b,c resulted in the formation of the zwitterionic silyl tungstenate complexes (CO)5WSi[SiMe2OCH2CH3]3Li (Li-6b), (CO)5WSi[SiMe2OCH(CH3)2]3Li (Li-6c), (CO)5WSi[SiMe2OCH2CH(CH3)2)]3Li (Li-6d), (CO)5WSi(SiMe2OCH2CH3)3Na (Na-6b), and (CO)5WSi[SiMe2OCH(CH3)2]3Na (Na-6c), respectively. The solid-state structures of Li-5b and Na-6b were determined by X-ray crystallography.

Close

Details

Original languageEnglish
Pages (from-to)9869-9879
Number of pages11
JournalInorganic Chemistry
Volume56
Issue number16
DOIs
Publication statusPublished - 21 Aug 2017

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Thionylimido complexes

    McGeachie, L. J. R., Carpenter-Warren, C. L., Cordes, D. B., Buehl, M., Gray, S. J., Hua, G., Slawin, A. M. Z. & Woollins, J. D., 12 Aug 2020, In : Zeitschrift für Anorganische und Allgemeine Chemie. Early View, 5 p.

    Research output: Contribution to journalArticle

  2. A facile synthesis of Robinson’s NHC-stabilised diborane(4)

    Trose, M., Cordes, D. B., Slawin, A. M. Z. & Stasch, A., 23 Jul 2020, In : European Journal of Inorganic Chemistry. Early View, 5 p.

    Research output: Contribution to journalArticle

  3. Janus face all-cis 1,2,4,5-tetrakis(trifluoromethyl)- and all-cis 1,2,3,4,5,6-hexakis(trifluoromethyl)- cyclohexanes

    O'Hagan, D., Yu, C., Kütt, A., Röschenthaler, G-V., Lebl, T., Cordes, D. B., Slawin, A. M. Z. & Bűhl, M., 21 Jul 2020, (Accepted/In press) In : Angewandte Chemie International Edition. In press

    Research output: Contribution to journalArticle

  4. Preventing undesirable structure flexibility in pyromellitate metal organic frameworks

    Hayes, O. G., Warrender, S. J., Cordes, D. B., Duncan, M. J., Slawin, A. M. Z. & Morris, R. E., 15 Jul 2020, In : European Journal of Inorganic Chemistry. 2020, 26, p. 2537-2544 8 p.

    Research output: Contribution to journalArticle

Related by journal

  1. Ab initio molecular dynamics investigation of beryllium complexes

    Raymond, O., Buehl, M., Lane, J., Henderson, W., Brothers, P. & Plieger, P., 4 Feb 2020, In : Inorganic Chemistry. Articles ASAP

    Research output: Contribution to journalArticle

  2. Application of NMR crystallography to highly disordered templated materials: extensive local structural disorder in the gallophosphate GaPO-34A

    Ashbrook, S. E., Dawson, D. M., Gan, Z., Hooper, J. E., Hung, I., Macfarlane, L. E., McKay, D., McLeod, L. K. & Walton, R. I., 4 Aug 2020, In : Inorganic Chemistry. Article ASAP

    Research output: Contribution to journalArticle

  3. Synthesis and polymorphism of mixed aluminium-gallium oxides

    Cook, D. S., Hooper, J. E., Dawson, D. M., Fisher, J. M., Thompsett, D., Ashbrook, S. E. & Walton, R. I., 24 Feb 2020, In : Inorganic Chemistry. Article ASAP

    Research output: Contribution to journalArticle

  4. A gadolinium spin label with both a narrow central transition and short tether for use in double electron electron resonance distance measurements

    Shah, A., Roux, A., Starck, M., Mosely, J. A., Stevens, M., Norman, D. G., Hunter, R. I., El Mkami, H., Smith, G., Parker, D. & Lovett, J. E., 18 Feb 2019, In : Inorganic Chemistry. Article ASAP

    Research output: Contribution to journalArticle

ID: 255494363

Top