Studies of silyl and germyl Group 6 species. 5. Silyl and germyl derivatives of methane- and benzenetellurols

Studies of silyl and germyl group VI species. Part VI. Synthesis and vibrational spectra of methylthiosilanes

“…The methylthiosilanes all give first-order lH nmr spectra (Table 3) consistent with free rotation about the C-Si and Si-S bonds. The lH and 13C chemical shifts and coupling constants correlate well with those of previously reported disilthianes (21), halogenosilanes (22,23), methyltefluro-silanes and -germanes (24,25) and provide the initial confirmation of the molecular species.…”

Synthesis of Sterically Hindered Tellurophenols and the Structure of [Cd(μ‐TeC6H2M3)2]∞

“…The high-spin (HS) ++ low spin (LS) crossover ['] has been well investigated by a number of physical methods.''. 3] In our investigations of the spin-crossover system [Fe( p t~)~l ( B F~)~ (ptz = 1 -propyltetrazole), we discovered a fascinating novel photophysical phenomenon, which we called "light-induced excited spin state trapping" (LIESST):t4. '1 Irradiation with green light (3. x 550 nm) into the 'A, -+ 'TI absorption band at sufficiently low temperatures ( T I 50 K) results in quantitative transformation of the LS state of this complex to a metastable HS state, the lifetime of which can be practically infinite.…”

Synthesis and NMR Investigations of Tellurobutyl-Substituted Silanes

“…While earlier attempts to prepare PhTeSiMe, from PhTeMgBr and Me,SiCl resulted only in the formation of the symmetric disproportionation product (Me,Si) 2 Te in low yield [6] Me,SiTeMe and Me,SiTePh have been prepared from the corresponding organolithium tellurides and Me,SiCl in 60-70 % yield [7]: While earlier attempts to prepare PhTeSiMe, from PhTeMgBr and Me,SiCl resulted only in the formation of the symmetric disproportionation product (Me,Si) 2 Te in low yield [6] Me,SiTeMe and Me,SiTePh have been prepared from the corresponding organolithium tellurides and Me,SiCl in 60-70 % yield [7]:…”