Reversible single-crystal to single-crystal polymorphic phase transformation of an organic crystal.
Das, Dinabandhu; Engel, Emile; Barbour, Leonard J; Chemical communications (Cambridge, England) 46 (2010) 1676–1678; doi:10.1039/b923370a

data_7105277
_publ_section_title
;
 Reversible single-crystal to single-crystal polymorphic phase
 transformation of an organic crystal.
;
_journal_issue                   10
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              1676
_journal_page_last               1678
_journal_paper_doi               10.1039/b923370a
_journal_volume                  46
_journal_year                    2010
_chemical_formula_moiety         'C28 H24 O4'
_chemical_formula_sum            'C28 H24 O4'
_chemical_formula_weight         424.47
_chemical_name_systematic
;
trans-9,10-dihydroxy-9,10-bis(4-methoxyphenyl)-9,10-dihydroanthracene
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                97.721(3)
_cell_angle_beta                 90.851(3)
_cell_angle_gamma                105.319(3)
_cell_formula_units_Z            2
_cell_length_a                   6.2160(9)
_cell_length_b                   10.9301(16)
_cell_length_c                   16.315(2)
_cell_measurement_reflns_used    840
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      21.17
_cell_measurement_theta_min      2.52
_cell_volume                     1057.9(3)
_computing_cell_refinement       'SAINT (Bruker, 2002)'
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'X-Seed (Barbour 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      294(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.906
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0335
_diffrn_reflns_av_sigmaI/netI    0.0724
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            8480
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.34
_diffrn_reflns_theta_min         1.95
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.9783
_exptl_absorpt_correction_T_min  0.9547
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.333
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             448
_exptl_crystal_size_max          0.53
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.188
_refine_diff_density_min         -0.191
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.983
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     293
_refine_ls_number_reflns         4786
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.983
_refine_ls_R_factor_all          0.1335
_refine_ls_R_factor_gt           0.0663
_refine_ls_shift/su_max          0.008
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0718P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1441
_refine_ls_wR_factor_ref         0.1722
_reflns_number_gt                2499
_reflns_number_total             4786
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b923370a.txt
_cod_data_source_block           Ia
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7105277