The role of non-covalent interactions in some 2-trifluoromethylchromones in the solid state.
Alcivar León, Christian David; Echeverría, Gustavo A.; Piro, Oscar E.; Ulic, Sonia E.; Jios, Jorge Luis; Pereanez, Jaime A.; Henao Castañeda, Isabel Cristina; Pérez, Hiram; New J. Chem. 41 (2017) 14659–14674; doi:10.1039/C7NJ00481H

data_7056718
_publ_section_title
;
 The role of non-covalent interactions in some 2-trifluoromethylchromones
 in the solid state.
;
_journal_issue                   23
_journal_name_full               'New J. Chem.'
_journal_page_first              14659
_journal_page_last               14674
_journal_paper_doi               10.1039/C7NJ00481H
_journal_volume                  41
_journal_year                    2017
_chemical_formula_sum            'C11 H6 F3 N O4'
_chemical_formula_weight         273.17
_chemical_name_systematic        2-trifluoromethylchromone-3-nitro-methyl
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_H-M_alt        'P 1 21/a 1'
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2016-04-12 deposited with the CCDC.
2017-10-26 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 110.717(9)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.5438(5)
_cell_length_b                   20.2116(11)
_cell_length_c                   7.7385(6)
_cell_measurement_reflns_used    863
_cell_measurement_temperature    297(2)
_cell_measurement_theta_max      73.0440
_cell_measurement_theta_min      4.3714
_cell_volume                     1103.61(14)
_computing_cell_refinement
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CrysAlisPro, Agilent Technologies,
Version 1.171.36.20 (release 27-06-2012 CrysAlis171 .NET)
(compiled Jul 11 2012,15:38:31)
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_computing_data_collection
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CrysAlisPro, Agilent Technologies,
Version 1.171.36.20 (release 27-06-2012 CrysAlis171 .NET)
(compiled Jul 11 2012,15:38:31)
;
_computing_data_reduction
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CrysAlisPro, Agilent Technologies,
Version 1.171.36.20 (release 27-06-2012 CrysAlis171 .NET)
(compiled Jul 11 2012,15:38:31)
;
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      297(2)
_diffrn_detector_area_resol_mean 16.0604
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.978
_diffrn_measurement_device_type  'Xcalibur, Eos, Gemini'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Cu) X-ray Source'
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.5418
_diffrn_reflns_av_R_equivalents  0.0278
_diffrn_reflns_av_unetI/netI     0.0419
_diffrn_reflns_Laue_measured_fraction_full 0.985
_diffrn_reflns_Laue_measured_fraction_max 0.978
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            4195
_diffrn_reflns_point_group_measured_fraction_full 0.985
_diffrn_reflns_point_group_measured_fraction_max 0.978
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         70.959
_diffrn_reflns_theta_min         4.375
_exptl_absorpt_coefficient_mu    1.405
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.79219
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.20 (release 27-06-2012 CrysAlis171 .NET)
(compiled Jul 11 2012,15:38:31)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.644
_exptl_crystal_description       fragment
_exptl_crystal_F_000             552
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent'
_exptl_crystal_size_max          0.485
_exptl_crystal_size_mid          0.214
_exptl_crystal_size_min          0.125
_refine_diff_density_max         0.301
_refine_diff_density_min         -0.390
_refine_diff_density_rms         0.084
_refine_ls_extinction_coef       0.010(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014)'
_refine_ls_goodness_of_fit_ref   1.133
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     173
_refine_ls_number_reflns         2092
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.133
_refine_ls_R_factor_all          0.1144
_refine_ls_R_factor_gt           0.0757
_refine_ls_shift/su_max          0.010
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1854P)^2^+0.2396P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2382
_refine_ls_wR_factor_ref         0.3330
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1247
_reflns_number_total             2092
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7nj00481h2.cif
_cod_data_source_block           shelx_CCDC2
_cod_database_code               7056718
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.549
_shelx_estimated_absorpt_t_max   0.844
_shelx_res_checksum              18098
_solvent_exptl_crystal_recrystallization_method Ethanol