Investigation of an Amide-Pseudo Amide Hydrogen Bonding Motif within a Series of Theophylline:Amide Cocrystals
Eddleston, Mark D.; Arhangelskis, Mihails; Fábián, Laszlo; Tizzard, Graham J.; Coles, Simon J.; Jones, William; Crystal Growth & Design  (2015) –; doi:10.1021/acs.cgd.5b00905

data_4513786
_publ_section_title
;
 Investigation of an Amide-Pseudo Amide Hydrogen Bonding Motif within a
 Series of Theophylline:Amide Cocrystals
;
_journal_name_full               'Crystal Growth &amp; Design'
_journal_paper_doi               10.1021/acs.cgd.5b00905
_journal_year                    2015
_chemical_formula_moiety         'C7 H8 N4 O2, C2 H5 N O'
_chemical_formula_sum            'C9 H13 N5 O3'
_chemical_formula_weight         239.24
_chemical_name_common            '1:1 theophylline acetamide cocrystal'
_chemical_name_systematic
;
 1,3-dimethyl-7H-purine-2,6-dione acetamide complex
;
_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                90.552(8)
_cell_angle_beta                 91.339(11)
_cell_angle_gamma                110.177(12)
_cell_formula_units_Z            2
_cell_length_a                   7.6545(13)
_cell_length_b                   8.3489(14)
_cell_length_c                   8.9540(16)
_cell_measurement_reflns_used    49186
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     536.86(17)
_computing_cell_refinement
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_data_collection       'COLLECT (Hooft, R.W.W., 1998)'
_computing_data_reduction
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_molecular_graphics
'OLEX2 (Dolomanov, Bourhis, Gildea, Howard & Puschmann, 2009)'
_computing_publication_material  'WINGX (Farrugia, 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SUPERFLIP (Palatinus & Chapuis, 2007)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 66.065
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type
'Bruker-Nonius APEX II CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans to fill the asymmetric unit'
_diffrn_radiation_monochromator  '10cm confocal mirrors'
_diffrn_radiation_source         'Bruker Nonius FR591 Rotating Anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0748
_diffrn_reflns_av_sigmaI/netI    0.0641
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            7260
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.12
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.114
_exptl_absorpt_correction_T_max  0.9977
_exptl_absorpt_correction_T_min  0.9898
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2007/2 (Sheldrick, G.M., 2007)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.480
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             252
_exptl_crystal_size_max          0.09
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.441
_refine_diff_density_min         -0.389
_refine_diff_density_rms         0.098
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.122
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     157
_refine_ls_number_reflns         1869
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.122
_refine_ls_R_factor_all          0.1294
_refine_ls_R_factor_gt           0.0909
_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^)+(0.1040P)^2^+1.3910P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2189
_refine_ls_wR_factor_ref         0.2508
_reflns_number_gt                1309
_reflns_number_total             1869
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            cg5b00905_si_002.cif
_cod_data_source_block           2010src1165r1a
_cod_original_cell_volume        536.86(16)
_cod_database_code               4513786