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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Tin and Mercury Compounds Supported by a Bulky Organometallic Ligand Incorporating a Pendant Guanidine Functionality*

Salima M. El-Hamruni A , Sebnem E. Sözerli B , J. David Smith C E , Martyn P. Coles D and Peter B. Hitchcock C
+ Author Affiliations
- Author Affiliations

A Department of Chemistry, Faculty of Science, Tripoli University, PO Box 13203, Tripoli, Libya.

B Department of Chemistry, Faculty of Arts and Sciences, Celal Bayar University, Manisa, Turkey.

C Department of Chemistry, University of Sussex, Falmer, Brighton BN1 9QJ, UK.

D School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6012, New Zealand.

E Corresponding author. Email: j.d.smith@sussex.ac.uk

Australian Journal of Chemistry 67(7) 1071-1080 https://doi.org/10.1071/CH14255
Submitted: 24 April 2014  Accepted: 28 May 2014   Published: 3 July 2014

Abstract

The structure of a triclinic form of the organolithium derivative LiR, R = C(SiMe3)2(SiMe2{hpp}) (1) (hppH = 1,3,4,6,7,8,-hexahydro-2H-pyrimido[1,2-a]pyrimidine) comprises dimers [1]2 held together by Li···H3C interactions like those in the polymeric structure [1] of the previously described orthorhombic form. Compound 1 reacts with the chlorides MCl2 (M = Hg or Sn) to give compounds HgRCl (2) or SnRCl (3), which have been characterised by NMR spectroscopy and X-ray crystallography. The structural parameters and conformations of the metallacycles MRLn are compared with those in related compounds containing bulky organosilicon ligands with pendant nitrogen donors. Compound 3 reacts with Li[P{H}Ar*] (Ar* = 2,4,6-tBu3C6H2) to give the crowded phosphanide SnR(P{H}Ar*) (4).


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