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_4505819
_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 N2 O6'
_chemical_formula_weight         254.20
_chemical_name_systematic
;
 diketopiperazine + 2,5-dihydroxybenzoquinone
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 95.017(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.080(4)
_cell_length_b                   6.278(2)
_cell_length_c                   6.788(2)
_cell_measurement_temperature    90(2)
_cell_volume                     512.8(3)
_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 0.940
_diffrn_measured_fraction_theta_max 0.940
_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  0.0570
_diffrn_reflns_av_sigmaI/netI    0.0794
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            4591
_diffrn_reflns_theta_full        31.42
_diffrn_reflns_theta_max         31.42
_diffrn_reflns_theta_min         1.69
_diffrn_standards_decay_%        <0.1
_diffrn_standards_number         '50 frames remeasured'
_exptl_absorpt_coefficient_mu    0.139
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.646
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             264
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.357
_refine_diff_density_min         -0.541
_refine_diff_density_rms         0.191
_refine_ls_extinction_coef       0.02(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   1.939
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     103
_refine_ls_number_reflns         1586
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.939
_refine_ls_R_factor_all          0.1565
_refine_ls_R_factor_gt           0.1201
_refine_ls_shift/su_max          0.016
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3426
_refine_ls_wR_factor_ref         0.3494
_reflns_number_gt                958
_reflns_number_total             1586
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg025535d_s8.cif
_cod_data_source_block           tl25fm
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4505819