TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): A cyano compound and aromatic compound of formula: V'-(Ar1)s-(Ar0)r-(Ar1)t-V' are reacted to manufacture conjugation-type compound.V'=halo, alkyl sulfonate, aryl sulfonate, aryl alkyl sulfonate, alkyl stannyl or boric acid residue. Preferred Definitions:    X11,X12,X21,X22==C(-A)2, preferably =C(-CN)2;    Ar0=group of formula (III), preferably of formula (IV), or of formula (II);    Z3-Z5=groups of formulae: -O-, -S-, -Se-, -Te-, -S(=O)-, -S(=O)2-, -C(-H)=C(-H)-, -C(-H)=N- and -N(-H)-;    Ar3,Ar4=6C or more trivalent aromatic hydrocarbyl or 4C or more trivalent heterocyclyl;    X3=X11;and    Y1,Y2=carbon or nitrogen.    SPECIFIC COMPOUNDS - 8 Conjugation-type compounds e.g. 2-(2-(5-(4,6-bis(dicyanomethylidene)-5,5-difluoro-3-hexyl-4H,5H,6H-cyclopenta(b)thiophen-2-yl)thieno(3,2-b)thiophen-2-yl)-6-(dicyanomethylidene)-5,5-difluoro-3-hexyl-4H,5H,6H-cyclopenta(b)thiophen-4-ylidene)propanedinitrile of formula (Ia), 2-(2-(5-(5-(4,6-bis(dicyanomethylidene)-5,5-difluoro-3-hexyl-4H,5H,6H-cyclopenta(b)thiophen-2-yl)thiophen-2-yl)thiophen-2-yl)-6-(dicyanomethylidene)-5,5-difluoro-3-hexyl-4H,5H,6H-cyclopenta(b)thiophen-4-ylidene)propanedinitrile, 2-(5-(5-(5,5-difluoro-4,6-dioxo-4H,5H,6H-cyclopenta(b)thiophen-2-yl)-4-hexylthiophen-2-yl)-3-hexylthiophen-2-yl)-5,5-difluoro-4H,5H,6H-cyclopenta(b)thiophene-4,6-dione, 2-(2-(5-(5-(6-(dicyanomethylidene)-5,5-difluoro-3-hexyl-4-oxo-4H,5H,6H-cyclopenta(b)thiophen-2-yl)thiophen-2-yl)thiophen-2-yl)-5,5-difluoro-3-hexyl-4-oxo-4H,5H,6H-cyclopenta(b)thiophen-6-ylidene)propanedinitrile and 2-(2-(10-(6-(dicyanomethylidene)-5,5-difluoro-3-methyl-4-oxo-4H,5H,6H-cyclopenta(b)thiophen-2-yl)-7-oxo-3,11-dithia-5,9-diazatricyclo(6.3.0.02,6)undeca-1(8),2(6),4,9-tetraen-4-yl)-5,5-difluoro-3-methyl-4-oxo-4H,5H,6H-cyclopenta(b)thiophen-6-ylidene)propanedinitrile are disclosed.    EXAMPLE - A 2-bromo-5,5-difluoro-3-hexyl-4H,5H,6H-cyclopenta(b)thiophene-4,6-dione compound (in g) (1.09), malononitrile (409 mg), ammonium acetate (358 mg) and toluene (40 ml) were mixed. Acetic acid (4 ml) was added and refluxed for 4 hours. The solution was washed, vacuum-dried, and purified to produce conjugation-type compound at yield of 50%.