TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): 2,5-Diamino-1,4-benzene dithiol dihydrochloride is used to produce tin-substituted dithiol dihydrochloride compound of formula (III), compound (III) is used to produce silylated thiophene-substituted compound of formula (IV), and the compound (IV) is used to produce halogenated thiophene-substituted compound of formula (V). The compound (V) is used to obtain benzobis(thiazole) compound (I).R11-R16=1-6C aliphatic hydrocarbyl, 3-7C alicyclic hydrocarbyl, or 6-10C aryl;andX1,X2=halo. SPECIFIC COMPOUNDS - 9 Benzobis(thiazole) compounds are disclosed e.g. 2,8-bis(4-octyl-1,3-thiazol-2-yl)-5,11-bis((5-(tris(propan-2-yl)silyl)thiophen-2-yl))-4,10-dithia-6,12-diazatricyclo(7.3.0.03,7)dodeca-1,3(7),5,8,11-pentaene of formula (Ia), 2,8-bis(5-octyl-1,3-thiazol-2-yl)-5,11-bis((5-(tris(propan-2-yl)silyl)thiophen-2-yl))-4,10-dithia-6,12-diazatricyclo(7.3.0.03,7)dodeca-1,3(7),5,8,11-pentaene, 2,8-bis(4-(2-ethylhexyl)-1,3-thiazol-2-yl)-5,11-bis((5-(tris(propan-2-yl)silyl)thiophen-2-yl))-4,10-dithia-6,12-diazatricyclo(7.3.0.03,7)dodeca-1,3(7),5,8,11-pentaene, 2,8-bis(5-(2-ethylhexyl)-1,3-thiazol-2-yl)-5,11-bis((5-(tris(propan-2-yl)silyl)thiophen-2-yl))-4,10-dithia-6,12-diazatricyclo(7.3.0.03,7)dodeca-1,3(7),5,8,11-pentaene, and 2,8-bis(4-(6-methylheptan-2-yl)-1,3-thiazol-2-yl)-5,11-bis((5-(tris(propan-2-yl)silyl)thiophen-2-yl))-4,10-dithia-6,12-diazatricyclo(7.3.0.03,7)dodeca-1,3(7),5,8,11-pentaene.    EXAMPLE - 1.92 g Benzo(1,2-d;4,5-d')bisthiazole was added to 250 ml tetrahydrofuran, and 14 ml lithium diisopropylamide solution cooled to -40 degrees C was dripped in reaction mixture, stirred for 1.5 hours, and 7.15 g tributyl tin chloride was dripped into product and stirred for 2 hours to obtain 1.54 g 4,8-bis-tributyl stannanyl benzo(1,2-d;4,5-d')bisthiazole. 1.93 g 4,8-Bis-tributyl stannanyl benzo(1,2-d;4,5-d')bisthiazole, 1.67 g 5-bromo-thiophen-2-yl triiso propyl silane, 64.7 mg tris(dibenzylidene acetone)dipalladium, 64.7 mg chloroform adduct, 65.6 mg triphenylphosphine, and 150 ml toluene were added, and reacted for 7 hours to obtain 237 mg 2,6-bis(5-triisopropyl silanyl thiophen-2-yl)-benzo(1,2-d;4,5-d')bisthiazole as pale yellow solid. 600 mg 2,6-Bis(5-triisopropyl silanyl thiophen-2-yl)-benzo(1,2-d;4,5-d') bisthiazole and 20 ml tetrahydrofuran were mixed, 1.3 ml lithium diisopropylamide solution was dripped into resultant solution, 1138 mg iodine was added and reacted at room temperature for 2 hours to obtain 579 mg 4,8-diiodo-2,6-bis(5-triisopropyl silanyl thiophen-2-yl)benzo(1,2-d;4,5-d')bisthiazole. 46 mg 4,8-Diiodo-2,6-bis(5-triisopropyl silanyl thiophen-2-yl)benzo(1,2-d;4,5-d')bisthiazole and 57 mg 2-tributyl stannanyl thiazole were mixed, 2 mg tris(2-furyl)phosphine, 2 mg tris(dibenzylidene acetone)dipalladium, 2 mg chloroform adduct, and 2 ml tetrahydrofuran were added to the resultant mixture and reacted for 21 hours to obtain 22 mg 4,8-bisthiazole 2-yl 2,6-bis(5-triisopropyl silanyl thiophen-2-yl)benzo(1,2-d;4,5-d')bisthiazole (45%) as yellow solid with melting point of 285 degrees C.