TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): Preparation of (I) comprises dehydrating (I-b) to (I). Preferred Components: In (I-d), n is: 10-200, preferably 30-180; or greater than 10, where (I-d) have a regioregularity of at least 50%; greater than 30, where (I-d) have a regioregularity of at least 80%, preferably at least 93%; or greater than 10, where (I-d) are a polymer having a regioregularity of 70-99%. The number average molecular weight of the polymer is up to 1000000, preferably 5000-500000, where number-average molecular weight/weight-average molecular weight is 1-3. The polymer is a homopolymer. The tellurium salt is sodium telluride. Preferred Definitions:    R1a=alkyl, cycloalkyl, aryl, heteroaryl (all optionally substituted with at least one cycloalkyl, heteroalkyl, heterocycloalkyl, aryl, heteroaryl, nitro, carboxy, formyl or -C(O)-R1e), heteroalkyl (optionally substituted with at least one cycloalkyl, heterocycloalkyl, aryl, heteroaryl, nitro, carboxy, formyl or -C(O)-R1e), or heterocycloalkyl (optionally substituted with at least one alkyl, heteroalkyl, aryl, heteroaryl, nitro, carboxy, formyl or -C(O)-R1e); and    R1e=alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, aryl or heteroaryl.    SPECIFIC COMPOUNDS - 3 Compounds (I) are claimed i.e. 3-hexyltellurophene of formula (I-p), 3-dodecyltellurophene, and 3-(2-ethylhexyl)tellurophene.    EXAMPLE - 12.25 g Tellurium in 350 ml of degassed ethanol was treated with 7.26 g of sodium borohydride under nitrogen in a 1l 3-neck round bottom flask fitted with a condenser. The reaction mixture was heated to reflux for 2.5 hours while an additional 7.26 g of sodium borohydride was added in 4 portions every 30 minutes. After this, the solution was cooled to 0 degrees C and 11.3 g of degassed solution of 3-(chloromethyl)-1-nonyn-3-ol in 20 ml of ethanol was added. The reaction was maintained at 0 degrees C for 1 hour before being warmed to room temperature. Then, 5.38 g of solution of potassium hydroxide in 50 ml/1.2 ml of ethanol/water was added and the reaction was heated to reflux for 2 hours. The reaction was quenched by stirring vigorously while exposed to laboratory air, and filtered through Celite (RTM: Diatomaceous earth). The solution was diluted with 400 ml of dichloromethane and washed three times with 300 ml of brine, dried over magnesium sulfate, and concentrated under vacuum to give a dark orange oil. The oil was then redissolved in 60 ml of hexanes in a 250 ml round bottom flask fitted with a condenser. This solution was treated with 666 mg of para-toluenesulfonic acid monohydrate and the reaction mixture was heated to reflux for 1 hour. The reaction was allowed to cool to room temperature before being diluted with 200 ml of hexanes and quenched with 50 ml of saturated sodium bicarbonate. The hexanes layer was washed three times with 150 ml of brine, dried over magnesium sulfate, and concentrated under vacuum, and purified to obtain 5.80 g of 3-hexyltellurophene.