New Insights into an Old Molecule: Interaction Energies of Theophylline Crystal Forms
Fucke, Katharina; McIntyre, Garry J.; Wilkinson, Clive; Henry, Marc; Howard, Judith A. K.; Steed, Jonathan W.; Crystal Growth & Design 12 (2012) 1395–; doi:10.1021/cg201499s

data_4505532
_publ_section_title
;
 New Insights into an Old Molecule: Interaction Energies of Theophylline
 Crystal Forms
;
_journal_issue                   3
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1395
_journal_paper_doi               10.1021/cg201499s
_journal_volume                  12
_journal_year                    2012
_chemical_formula_sum            'C7 H8 N4 O2'
_chemical_formula_weight         180.17
_chemical_name_common            Theophylline
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.087(2)
_cell_length_b                   15.579(3)
_cell_length_c                   3.8629(6)
_cell_measurement_reflns_used    1425
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      26.40
_cell_measurement_theta_min      3.04
_cell_volume                     787.6(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.1863
_diffrn_reflns_av_sigmaI/netI    0.1330
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       5
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            6379
_diffrn_reflns_theta_full        29.34
_diffrn_reflns_theta_max         29.34
_diffrn_reflns_theta_min         2.03
_exptl_absorpt_coefficient_mu    0.116
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.520
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Fragment of prism'
_exptl_crystal_F_000             376
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.311
_refine_diff_density_min         -0.317
_refine_diff_density_rms         0.081
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.972
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     124
_refine_ls_number_reflns         2139
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.971
_refine_ls_R_factor_all          0.1130
_refine_ls_R_factor_gt           0.0786
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1194P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1934
_refine_ls_wR_factor_ref         0.2118
_reflns_number_gt                1370
_reflns_number_total             2139
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg201499s_si_002.cif
_cod_data_source_block           whole
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      Pna2(1)
_cod_database_code               4505532