Reversible phase transition of the 1 : 1 co-crystal of 1,4-diazabicyclo-[2.2.2]octane (DABCO) and hydroquinone,
Ye, Heng-Yun; Ge, Jia-Zhen; Chen, Fang; Xiong, Ren-Gen; CrystEngComm 12 (2010) 1705–; doi:10.1039/b923314h

data_7212246
_publ_section_title
;
 Reversible phase transition of the 1&#x2009;:&#x2009;1 co-crystal of
 1,4-diazabicyclo-[2.2.2]octane (DABCO) and hydroquinone,
;
_journal_issue                   6
_journal_name_full               CrystEngComm
_journal_page_first              1705
_journal_paper_doi               10.1039/b923314h
_journal_volume                  12
_journal_year                    2010
_chemical_formula_moiety         'C6 H12 N2, C6 H6 O2 '
_chemical_formula_sum            'C12 H18 N2 O2'
_chemical_formula_weight         222.28
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 119.034(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.9278(7)
_cell_length_b                   9.3661(7)
_cell_length_c                   11.4995(8)
_cell_measurement_reflns_used    8268
_cell_measurement_temperature    93(2)
_cell_measurement_theta_max      27.44
_cell_measurement_theta_min      3.91
_cell_volume                     1123.24(14)
_computing_cell_refinement       'crystalclear (Rigaku, 2005)'
_computing_data_collection       'crystalclear (Rigaku, 2005)'
_computing_data_reduction        'crystalclear (Rigaku, 2005)'
_computing_molecular_graphics
'SHELXtl (Sheldrick, 2008); diamond (Brandenburg & Putz, 2005)'
_computing_publication_material  'SHELXtl (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXtl (Sheldrick, 2008)'
_computing_structure_solution    'SHELXtl (Sheldrick, 2008)'
_diffrn_ambient_temperature      93(2)
_diffrn_detector_area_resol_mean 13.6612
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Rigaku Raxis-Rapid diffractometer'
_diffrn_measurement_method       '/w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0263
_diffrn_reflns_av_sigmaI/netI    0.0252
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            10564
_diffrn_reflns_theta_full        27.44
_diffrn_reflns_theta_max         27.44
_diffrn_reflns_theta_min         3.43
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8943
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'crystalclear (Rigaku, 2005)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.314
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             480
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.340
_refine_diff_density_min         -0.213
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.084
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     153
_refine_ls_number_reflns         2550
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.084
_refine_ls_R_factor_all          0.0460
_refine_ls_R_factor_gt           0.0381
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0634P)^2^+0.1809P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1082
_refine_ls_wR_factor_ref         0.1134
_reflns_number_gt                2079
_reflns_number_total             2550
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b923314h.txt
_cod_data_source_block           93K
_cod_original_cell_volume        1123.24(13)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7212246