Two polymorphs of 1,8-dichloro­anthracene

Müller, P.; Fronczek, F.R.; Smith, S.J.; Mako, T.; Levine, M.

doi:10.1107/S0108270113001790

Figure 5
Projections, approximately along the b axes, of (a) the monoclinic polymorph and (b) the orthorhombic polymorph, showing the nearest Cl⋯H distances in the packing of the two structures. Distances around the Cl atoms (in Å), in (a) Cl1⋯H2ⁱ = 2.98, Cl1⋯H3ⁱ = 3.33, Cl1⋯H4ⁱⁱ = 2.99, Cl1⋯H4ⁱⁱⁱ = 2.95, Cl1⋯H10ⁱⁱ = 3.05, Cl2⋯H5ⁱⁱ = 3.07, Cl2⋯H6^iv = 3.46, Cl2⋯H7^v = 3.28, Cl2⋯H7^iv = 3.16 and Cl2⋯H5^vi = 2.95; in (b) Cl1⋯H7^vii = 2.93, Cl1⋯H6^vii = 3.88, Cl1⋯H4^viii = 2.84, Cl1⋯H4^ix = 3.24, Cl1⋯H10^ix = 3.01, Cl2⋯H5^ix = 3.04, Cl2⋯H3^x = 3.15, Cl2⋯H2^x = 3.23, Cl2⋯H2^xi = 3.46 and Cl2⋯H5^xii = 3.10. [Symmetry codes: (i) −x, y − $[{1\over 2}]$ , −z + $[{1\over 2}]$ ; (ii) x, −y + $[{3\over 2}]$ , z − $[{1\over 2}]$ ; (iii) x, −y + $[{5\over 2}]$ , z − $[{1\over 2}]$ ; (iv) −x + 1, −y + 1, −z + 1; (v) −x + 1, −y, −z + 1; (vi) x, −y + $[{1\over 2}]$ , z − $[{1\over 2}]$ ; (vii) −x + 1, −y + 1, z + $[{1\over 2}]$ ; (viii) x + $[{1\over 2}]$ , −y + $[{5\over 2}]$ , z; (ix) x + $[{1\over 2}]$ , −y + $[{3\over 2}]$ , z; (x) −x + 1, −y + 2, z − $[{1\over 2}]$ ; (xi) −x + 1, −y + 1, z − $[{1\over 2}]$ ; (xii) x + $[{1\over 2}]$ , −y + $[{1\over 2}]$ , z.]

STRUCTURAL
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ISSN: 2053-2296

Volume 69| Part 2| January 2013| Pages 199-203

doi:10.1107/S0108270113001790

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