Crystal Structure of Benzene at −3° C.

摘要: A PRELIMINARY determination1 of the crystal structure benzene at −22° C. showed that crystals are orthorhombic. space-group Pbca, with four centro-symmetrical molecules in unit cell, and normals to planes roughly perpendicular b-axis inclined about 50° c-axis. We have now completed first stage refinement −3° Crystals were grown Lindemann glass tubes wall thickness 0.05 mm. bore 0.36 by method Keesom Taconis2 as modified later workers3. 288 independent reflexion intensities representing 56 per cent total possible copper radiation estimated visually from oscillation photographs all three principal axes. Chromium-K was used obtain accurate values cell dimensions Straumanis method; revised a = 7.460, b 9.666 c 7.034 A.