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The structure of the title compound [systematic name: 8-butyl-8-(2-methyl-1H-inden-1-yl)-8-silatricyclo[7.4.0.02,3]trideca-1(13),2,4,6,9,11-hexaene], C26H26Si, at 110 K has orthorhombic (Pbca) symmetry. In the molecule, the butyl group displays an extended conformation with the C—C—C—C torsion angle of 176.8 (2)°. The dihedral angle between the biphenyl group and the indole group is 60.04 (2)°. The structure exhibits a weak intramolecular C—H...π interaction.doi:10.1107/s2414314616011512 fatcat:rdydb6y4xredjhttzd7cgf62ja