Reactions of 1,2,4‐Trithiolane and Its 4‐
S
‐Oxide with Diphosphane Pt
0
Complexes
摘要:
AbstractReactions of 1,2,4‐trithiolanes with Pt0 complexes often proceed via an oxidative addition of the Pt0 complex fragment into the S–S bond and subsequent extrusion of a thioketone molecule by ring contraction. The six‐membered intermediate 5a, formed in the course of the reaction of the parent 1,2,4‐trithiolane (1a) and Pt0 complex 4, was detected bymeans of low‐temperature NMR spectroscopy. Stable derivatives of this type (compounds 9, 11 and 12) were isolated either by using (dppe)Pt0 complex 8 or 1,2,4‐trithiolane 4‐S‐oxide (10). The molecular structures of platinum complexes 9, 11 and 12, as well as their unexpected stability, are discussed.
Thermal Reactions of Regioisomeric 1,2,4-Trithiolane<i>S</i>-Oxides
作者:Grzegorz Mloston、Jaroslaw Romanski、Michael L. McKee、Hans Peter Reisenauer、Peter R. Schreiner
DOI:10.1002/ejoc.200901440
日期:2010.4
The products of the gas-phase pyrolysis of two regioisomeric 1,2,4-trithiolane S-oxides were collected in an argon matrix at 10 K and studied by means of spectroscopic as well as computational methods. Whereas the main products of the pyrolysis of the "symmetrical" S-oxide were identified as thioformaldehyde S-oxide and thioformaldehyde S-sulfide, the "non-symmetrical" S-oxide gave predominantly dithioformic
在 10 K 的氩气基质中收集两种区域异构 1,2,4-三硫戊环 S 氧化物的气相热解产物,并通过光谱和计算方法进行研究。“对称”S-氧化物热解的主要产物被鉴定为硫代甲醛S-氧化物和硫代甲醛S-硫化物,而“非对称”S-氧化物主要产生二硫代甲酸,其以s-的混合物形式存在。顺式和 s-反式构象异构体。我们提出了反应途径的合理化,包括密度泛函理论计算。