1,1-DithioIs 1.3- dithioles

The preparation of 1,2-dithiole derivatives by oxidation of suitable dithiols is quite general, and may be applied to the preparation of 1,2-dithiolane (1) (69JOC36), benzo-1,2-dithiole (77c) <78JOC3374) and naphtho[l,8-crf][l,2]dithioIe (26) (65JOC3997) from the... 

Thioacetic acid reacts with 3-chloro-l,2-dithiolium ions to give the corresponding l,2-dithiole-3-thione. The mechanism shown in Scheme 17 has been suggested.Hydroselenolysis of 3-methylthio-l,2-benzodithiolium ion gives the corresponding l,2-dithioIe-3-selone. ... 

Sodium disulfide reacts with octachloronaphthalene to form tetrachloronaphtho[l,8-cd 4,5-c d ]bis[l,2-dithioIe] (27b) and naphthalene or tetracene provides related fused 1,2-dithioles (27a) and (27c) by treatment with sulfur reagents (76JA252). 

From 5-[(l,2-dithiol-3-ylidene)alkyl]-l,2-dithiole-3-thiones (74) other extended structures can be obtained, - e.g., (a) a-(l,2-dithiol-3-ylidene)-a -(l,3-dithioI-2-ylidene)thioketones (77), by reaction... 

The two best characterized examples are (Ph4P)3[Os(mnt)3] (mnt = c -l,2-dicyanoethylene-l,2-dithiolate), made from [OsBr ] " and the sodium salt of the ligand with Na2S204 Os(tdt)j (tdt = toluene-3,4-dithioI), a black material made from the hand and [OsBr p" in base, and (Me4N)[Os(tdt)3] for which a similar reaction is used but sodium dithionite is used as reducing agent. The ESR spectrum of [Os(mnt)3] has been measured and also IR and electronic spectra on the tdt complexes. Cyclic voltammetric studies on Os(tdt)3 show that the redox system in equation (10) exists. ... 

As already noted in this Chapter, 4,5-dialkyl-l,3-dithiole-2-thiones are formed, with l,2-dithioIe-3-thiones, when thioketones are treated with sulphur and carbon disulphide in the presence of a base. ... 

The dithiol (34) is offered as a more pleasant substance, both on its own and in the derived 1,3-dithians, than propane-1,3-dithioI. 

Consequently, we will centre our attention on the main type of acceptors according to their different molecular nature. Thus, we will focus on derivatives of the parent molecules TCNQ, dicyano-p-quinonediimine (DCNQI), other polycyano derivatives, dithiolene metal complexes (l,3-dithioIe-2-thione-4,5-dithiolate, dmit) and some interesting cases in the emerging chemistry of fullerene [13] derivatives as shown in Figure 1.1. 

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