Lloyd, N.C., Nicholson, B.K., Wilkins, A.L. & Thomson, R. (2002). Novel six-coordinate Aryl- and Alkyltin complexes. Chemistry in New Zealand, 66(1), 53-54.
Permanent Research Commons link: http://hdl.handle.net/10289/4709
Organo-tin compounds have wide applications as pesticides and as intermediates for organic synthesis.¹ They are invariably Sn(IV) derivatives and are generally four-coordinate.² The mixed organo/chioro compounds of the type RnSnCI4-n do however have the ability to expand their coordination numbers to five or six. This depends critically on the substituents - with four organic groups, R₄Sn, there is no tendency at all to coordinate extra ligands, while at the other extreme SnCl₄ readily forms six-coordinate [SnC1₄L₂] complexes since the electronegative halo groups increase the Lewis acidity of the tin centre.
New Zealand Institute of Chemistry
This article has been published in the journal: Chemistry in New Zealand. Used with permission.