(Z)-3-(9-Anthryl)-1-(2-thienyl)prop-2-en-1-oneThis paper is dedicated to Her Majesty, Queen Sirikit of Thailand on the occasion of her 77th Birthday Anniversary which fell on August 12th, 2009.

(Z)-3-(9-Anthryl)-1-(2-thienyl)prop-2-en-1-oneThis paper is dedicated to Her Majesty, Queen Sirikit of Thailand on the occasion of her 77th Birthday Anniversary which fell on August 12th, 2009.

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There are two crystallographically independent molecules in the asymmetric unit of the title heteroaryl chalcone, C21H14OS: the dihedral angle between Keychains the thiophene and anthracene rings is 75.07 (17)° in one molecule and 76.32 (17)° in the other.

The Boxspring crystal structure is consolidated by short C.O [3.348 (5)–3.

394 (5) Å], C.S [3.607 (5)–3.

666 (5) Å] and S.O [2.926 (3) Å] contacts, as well as by C—H.

π and π–π interactions [Cg.Cg = 3.745 (3) Å].