TY - JOUR
T1 - Molecular structure of a novel heterocycle
T2 - 1,1,4,4,tetramethyl-1 H,4 H-thieno[3,4-c]thiophene
AU - Goldberg, Israel
AU - Freund, Meir
AU - Braverman, Samuel
PY - 1981/12
Y1 - 1981/12
N2 - The X-ray crystal structure of the title compound, C10H14S1, is reported. Crystals are monoclinic, space group P21/c with Z = 2 in a unit cell of dimensions a = 8.517(2), b = 6.109(1), c = 10.730(1) Å, and β = 107.01(2)°. The structure was solved by direct methods and refined by full-matrix least squares to R = 0.032 for 1059 diffractometer data. The bicyclic molecular framework contains eight π-electrons and is planar and rigid, all relevant interatomic distances corresponding to either ideally single or ideally double bonds. The first UV absorption observed at 3.61 eV, and tentatively described as due to a π(bg) → π*(au*) electron transition, is significantly higher than that found in a related aromatic tetraphenylthienothiophene system.
AB - The X-ray crystal structure of the title compound, C10H14S1, is reported. Crystals are monoclinic, space group P21/c with Z = 2 in a unit cell of dimensions a = 8.517(2), b = 6.109(1), c = 10.730(1) Å, and β = 107.01(2)°. The structure was solved by direct methods and refined by full-matrix least squares to R = 0.032 for 1059 diffractometer data. The bicyclic molecular framework contains eight π-electrons and is planar and rigid, all relevant interatomic distances corresponding to either ideally single or ideally double bonds. The first UV absorption observed at 3.61 eV, and tentatively described as due to a π(bg) → π*(au*) electron transition, is significantly higher than that found in a related aromatic tetraphenylthienothiophene system.
UR - http://www.scopus.com/inward/record.url?scp=34250246578&partnerID=8YFLogxK
U2 - 10.1007/bf01210390
DO - 10.1007/bf01210390
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:34250246578
SN - 0308-4086
VL - 11
SP - 157
EP - 165
JO - Journal of Crystal and Molecular Structure
JF - Journal of Crystal and Molecular Structure
IS - 5-6
ER -