Solid-state 119Sn NMR and Mössbauer spectroscopy of "distannynes": evidence for large structural differences in the crystalline phase

Geoffrey H Spikes; Jason R Giuliani; Matthew P Augustine; Israel Nowik; Rolfe H Herber; Philip P Power

doi:10.1021/ic060983m

Solid-state 119Sn NMR and Mössbauer spectroscopy of "distannynes": evidence for large structural differences in the crystalline phase

Inorg Chem. 2006 Oct 30;45(22):9132-6. doi: 10.1021/ic060983m.

Authors

Geoffrey H Spikes¹, Jason R Giuliani, Matthew P Augustine, Israel Nowik, Rolfe H Herber, Philip P Power

Affiliation

¹ Department of Chemistry, University of California, Davis, California, 95616, USA.

PMID: 17054374
DOI: 10.1021/ic060983m

Abstract

The "distannynes" Ar'SnSnAr' (Ar' = C6H3-2,6(C6H3-2,6-Pr(i)2)2) and ArSnSnAr (Ar = C6H3-2,6(C6H2-2,4,6-Pr(i)3)2) were examined by solid-state (119)Sn NMR and Mössbauer spectroscopy. The two compounds display substantially different spectroscopic parameters, while differing only in the absence (Ar'SnSnAr') or presence (ArSnSnAr) of a para-Pr(i) group in the flanking aryl rings of their terphenyl substituents. The spectroscopic differences can be interpreted in terms of a more trans-bent geometry and a longer Sn-Sn bond for ArSnSnAr in comparison to the wider Sn-Sn-C angle (125.24(7) degrees ) and shorter Sn-Sn bond length (2.6675(4)A) determined from the crystal structure of Ar'SnSnAr'. The differences are consistent with previously published calculations by Nagase and Takagi for ArSnSnAr.