The hard Lewis acid characteristics of Si(IV) serve as inspiration for the chemist to explore silicon complexes with heavier (and soft) donor atoms in their ligand sphere. Methimazole-derivatives as (S,N)-donors support the formation of heterodinuclear complexes with hard and soft metal centres. The herein presented paddlewheel-shaped compounds accommodate a metalla-to-sila-site trans-annular dative bond. In addition to d8 transition metal centres as s-lone pair donors, Ge(II) and Sn(II) were shown to enter the silicon coordination sphere in a similar manner. Quantum chemical calculations as well as 29Si NMR spectroscopy confirmed intense electronic interactions between the two metal sites in those complexes. In particular, the M-Si bond length responds to the X/Y substitution pattern, the 29Si NMR shift depends both on M and the metal bound substituent Y (with greatest effect upon substitution of Y for a non-coordinating anion), and 1J(29Si-195Pt) and 1J(29Si-119Sn/117Sn) coupling (for M = Pt and Sn, respectively) confirm the electronic communication through the molecular cages .References: Wagler, J.; Brendler, E. Angew. Chem. Int. Ed. 2010  , 49, 624; Wagler, J.; Brendler, E.; Langer, T.; P�ttgen, R.; Heine, T.; Zhechkov, L. Chem. Eur. J. 2010  , 16, 13429; Truflandier, L. A.; Brendler, E.; Wagler, J.; Autschbach, J. Angew. Chem. Int. Ed. 2011  , 50, 255; Autschbach, J.; Sutter, K.; Truflandier, L. A.; Brendler, E.; Wagler, J. Chem. Eur. J. 2012  , 18, 12803-12813.

Paddlewheel shaped heterodinuclear complexes with group 10 and group 14 elements

245th National Meeting (2013)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.