Toward Novel Solid-State Forms of the Anti-HIV Drug Efavirenz: From Low Screening Success to Cocrystals Engineering Strategies and Discovery of a New Polymorph
de Melo, Ariane Carla Campos; de Amorim, Isadora Ferreira; Cirqueira, Marilia de Lima; Martins, Felipe Terra; Crystal Growth & Design 13 (2013) 1558–; doi:10.1021/cg3018002

data_4507575
_publ_section_title
;
 Toward Novel Solid-State Forms of the Anti-HIV Drug Efavirenz: From Low
 Screening Success to Cocrystals Engineering Strategies and Discovery of a
 New Polymorph
;
_journal_issue                   4
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1558
_journal_paper_doi               10.1021/cg3018002
_journal_volume                  13
_journal_year                    2013
_chemical_absolute_configuration ad
_chemical_formula_sum            'C40 H30 Cl2 F6 N4 O4'
_chemical_formula_weight         815.58
_chemical_name_systematic
;
(4S)-6-Chloro-4-(2-cyclopropylethynyl)-4-(trifluoromethyl)-2,4-dihydro-1H-3,1-
benzoxazin-2-one 1,2-bis(4-pyridyl)ethane cocrystal
;
_space_group_IT_number           1
_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_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4
_audit_creation_date             2012-10-19
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                84.956(4)
_cell_angle_beta                 85.946(4)
_cell_angle_gamma                74.581(4)
_cell_formula_units_Z            1
_cell_length_a                   5.3101(4)
_cell_length_b                   8.6465(5)
_cell_length_c                   20.7050(14)
_cell_measurement_reflns_used    4162
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      26.46
_cell_measurement_theta_min      2.45
_cell_volume                     911.77(11)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.971
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.017
_diffrn_reflns_av_unetI/netI     0.0296
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            7616
_diffrn_reflns_theta_full        25
_diffrn_reflns_theta_max         26.5
_diffrn_reflns_theta_min         1.98
_exptl_absorpt_coefficient_mu    0.258
_exptl_absorpt_correction_T_max  0.990
_exptl_absorpt_correction_T_min  0.800
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'Blessing, R. H. (1995) Acta Cryst., A51, 33-38'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.485
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             418
_exptl_crystal_size_max          0.09
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.372
_refine_diff_density_min         -0.379
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.04(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     538
_refine_ls_number_reflns         5292
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0426
_refine_ls_R_factor_gt           0.0379
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0465P)^2^+0.5513P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0924
_refine_ls_wR_factor_ref         0.0963
_reflns_number_gt                4881
_reflns_number_total             5292
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            cg3018002_si_002.cif
_cod_data_source_block           Efavirenz_BPA
_cod_original_sg_symbol_H-M      P1
_cod_database_code               4507575