Trimesitylzinn-hydroxid und -fluorid als modellsubstanzen zur bestimmung der “normal”-kovalenzabstände Zinn—Sauerstoff und Zinn—Fluor

Crystal structure of tribenzyltin(IV) hydroxide, (C7H7)3SnOH

“…The crystal structure of tribenzyltin hydroxide, BzbSnOH, is iso-* e-mail: hreuter@uos.de typic to that of triphenyltin hydroxide, PluSnOH, [3,4], There are no hydrogen bridges within a chain and between adjacent chains. Similar structural features were found for BzlMe2SnOH [5] and EtjSnOH [6], whereas the structure of trimesityltin hydroxide, MesaSnOH, consists of isolated molecules with tetrahedrally coordinated tin [7]. In the title structure some carbon atoms show large anisotropics probably to a statistical disorder of the corresponding phenyl groups.…”

Double-C,N-chelated tri- and diorganotin(IV) fluorides

“…These compounds have relatively high melting points, and are rather insoluble in common organic solvents, which is a limitation in studies of their structure and reactivity. Only a small number of compounds containing bulky ligands, e.g., Sn[C(SiMe 2 Ph) 3 ]Me 2 F [5], Sn[C(SiMe 3 ) 3 ]Ph 2 F [5], Sn[C 6 H 2 (Me 3 -2,4,6) 3 ]Me 2 F [6] and Sn(CH 2 SiMe 3 ) 3 F [7], with a four-coordinated tin central atom, are monomeric with a Sn-F terminal single bond distance about 1.96 Å [8]. There is an example of the compound (Sn[(CH 2 CH 2 CH 2 ) 3 N]FÁH 2 O) with an intramolecular Sn-N interaction; the structure of this compound in the solid state has been established as tetrameric due to intermolecular fluorine and hydrogen bridges, respectively, and monomeric in solution [9].…”

New Multinuclear Experiments on Solid Organotin Fluorides

“…How- Figure 8 shows the reduced splitting when the decoupler is ever, Mes 3 SnF has shorter bond lengths of 1.96 Å (30). This offset from 188.29 MHz, its usual position in our operations.…”

“…However, it is clear that, because of the low values of the anisotropies (which are much lower in magnitude than the dipolar coupling constants), there are considerable uncertainties in the results for Mes 3 SnF. For Mes 3 SnF an X-ray diffraction measurement has been made that gives the Sn-F bond lengths as 1.957 and 1.965 Å (30). Recalling that the magnetogyric ratio for 119 Sn is negative gives D Å 05650 and 05582 Hz for the two bond lengths respectively.…”