Structure of 1,4-Bis(3-thianaphthyl)-Buta-1, 3-Diyne

1,4-bis(3-thianaphthyl)-buta-1,3-diyne, C20S2H10, Mr=314.43, m.p = 438K, monoclinic, P21/c, a= 13.276(1), b=3.958(1), c=14.120(3)A. β= 92.11(1)°, V=741.45A3 Z=2, Dx=1.408 gm.cm-3 μ=3.36cm”1 F(000)=324.0, λ(MoKJ)=0.71073 A, T=300K, final R and wR are 0.0303 and 0.0433 respectively using 1022 observations used in structure factor calculation. The monomer structure (with D- 3.664 A, Sj =3.502A and the angle πi=62.25°) does not satisfy the requirements for topochemical polymerisation (Wegner, 1977). © 1995, Taylor & Francis Group, LLC. All rights reserved.