Ethylene-2,2-dithiolates

Hi) Structural properties and reactivity of complexes with 1,1-substituted ethylene-2,2-dithiolates and related binegative and mononegative ligands... 

In another approach to analogs, nortestosterone is first converted to the thioketal by treatment with ethylene dithiol in IUe presence of boron trifluoride. (The mild conditions of this reaction compared to those usually employed in preparing the oxygen ketals probably accounts for the double bond remaining at 4,5.) Treatment of this derivative with sodium in liquid ammonia... 

In order to prove the identity of (XI), it was synthesized in a different manner. Ethylene dibromide was converted into ethylene dithiol, which was then heated with bromofluoroethane in the presence of sodium hydroxide. The yield by this method was small. The compound (XI), otherwise called sesqui-fluoro-H , is a liquid. It is neither a vesicant nor does it produce fluoroacetate-like symptoms in the animal body. 

A copolymer produced from cyclohexene and 1, 2-ethylene dithiol (8) as a representative of aliphatic and alycyclic sulfides... 

The anions from 356 [Z = P(0)(0Et)2 " or COOMe ] react with carbon disulphide to give ethylenic dithiolate anions which may be alkylated to give 360 the latter (e.g. with R = Me) undergo a variety of displacement reactions (Scheme 46) to give compounds... 

Ketals other than ethylene ketals are prepared by the orthoformate procedure with heating. Thioketals are obtained from dithiols, monothiols and hemithioketals by the boron trifluoride-catalysis method. Hemi-thioketals have also been prepared in high yield by the exchange proce-dure.""""... 

Coordination compounds with delocalised ground states. The transition metal derivatives of dithioketones and ethylene(l,2)dithiolates (metal dithienes). G. N. Schrauzer, Acc. Chem. Res., 1969,2,72-80 (36). 

Alternatively, l,3-dithiol-2-ones have been obtained by reacting di-isopropylxanthogen disulfide with unsaturated substrates, such as disubstituted alkynes R2C2, in the presence of AIBN (azoisobutyrylnitrile), a radical initiator.78 Finally, vinylene dithiocarbonates can be obtained by reacting mer-cury(II) acetate with the corresponding trithiocarbonates, generated by reaction of electrophilic alkynes with ethylene trithiocarbonate.79 Analogously,... 

Figure 12 The polyiodide network determined by I- I cation/anion contacts in 4-ferrocenium-ethylene-l,3-dithiole-2-thione I2 adducts balanced by V-shaped pentaiodides...

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