Engineering Crystalline Architecture with Supramolecular Tapes: Studies on Secondary Donor−Acceptor Interactions in Cocrystals of the Cyclic Dipeptide of Glycine
Luo, Tzy-Jiun M.; Palmore, G. Tayhas R.; Crystal Growth & Design 2 (2002) 337–; doi:10.1021/cg025535d

data_4505811
_publ_section_title
;
 Engineering Crystalline Architecture with Supramolecular Tapes:&#x2009;
 Studies on Secondary Donor&#x2212;Acceptor Interactions in Cocrystals of
 the Cyclic Dipeptide of Glycine
;
_journal_issue                   5
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              337
_journal_paper_doi               10.1021/cg025535d
_journal_volume                  2
_journal_year                    2002
_chemical_formula_sum            'C10 H10 Cl2 N2 O4'
_chemical_formula_weight         293.10
_chemical_name_systematic
;
 diketopiperazine + 2,5-dichlorohydroquinone
;
_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                 107.169(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.895(2)
_cell_length_b                   5.1184(12)
_cell_length_c                   12.390(3)
_cell_measurement_temperature    90(2)
_cell_volume                     539.0(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'SHELXTL 5.03, XP (Sheldrick, 1994)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      90(2)
_diffrn_measured_fraction_theta_full 0.948
_diffrn_measured_fraction_theta_max 0.948
_diffrn_measurement_device_type  'Bruker SMART 1000'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0482
_diffrn_reflns_av_sigmaI/netI    0.0633
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            4740
_diffrn_reflns_theta_full        31.43
_diffrn_reflns_theta_max         31.43
_diffrn_reflns_theta_min         2.50
_diffrn_standards_decay_%        <0.1
_diffrn_standards_number         '50 frames remeasured'
_exptl_absorpt_coefficient_mu    0.611
_exptl_absorpt_correction_T_max  0.9643
_exptl_absorpt_correction_T_min  0.8876
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.806
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       stick
_exptl_crystal_F_000             300
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.381
_refine_diff_density_min         -0.275
_refine_diff_density_rms         0.084
_refine_ls_extinction_coef       0.000(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.918
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     103
_refine_ls_number_reflns         1686
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.918
_refine_ls_R_factor_all          0.0569
_refine_ls_R_factor_gt           0.0368
_refine_ls_shift/su_max          0.083
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0341P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0719
_refine_ls_wR_factor_ref         0.0773
_reflns_number_gt                1225
_reflns_number_total             1686
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg025535d_s11.cif
_cod_data_source_block           tl26fm
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               4505811