Crystal Engineering of Hand-Twisted Helical Crystals.
Saha, Subhankar; Desiraju, Gautam R.; Journal of the American Chemical Society 139 (2017) 1975–1983; doi:10.1021/jacs.6b11835

data_4125711
_publ_section_title
;
 Crystal Engineering of Hand-Twisted Helical Crystals.
;
_journal_issue                   5
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              1975
_journal_page_last               1983
_journal_paper_doi               10.1021/jacs.6b11835
_journal_volume                  139
_journal_year                    2017
_chemical_formula_sum            'C14 H9 Cl O3'
_chemical_formula_weight         260.66
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014
_cell_angle_alpha                90
_cell_angle_beta                 91.965(9)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.862(11)
_cell_length_b                   3.822(3)
_cell_length_c                   19.238(13)
_cell_measurement_reflns_used    3242
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      33.6
_cell_measurement_theta_min      3.3
_cell_volume                     1165.6(15)
_computing_cell_refinement
;
CrystalClear-SM Expert 2.0 rc14 (Rigaku, 2009)
;
_computing_data_collection
;
CrystalClear-SM Expert 2.0 rc14 (Rigaku, 2009)
;
_computing_data_reduction
;
CrystalClear-SM Expert 2.0 rc14 (Rigaku, 2009)
;
_computing_structure_refinement  'SHELXL-14 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXL-14 (Sheldrick, 2014)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 13.6612
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device
;
XtaLABmini: Fixed Chi 2 circle
;
_diffrn_measurement_device_type
;
Rigaku Mercury375R (2x2 bin mode)
;
_diffrn_measurement_method       'profile data from \w-scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0632
_diffrn_reflns_av_unetI/netI     0.0445
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            10158
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.983
_diffrn_reflns_theta_min         1.637
_exptl_absorpt_coefficient_mu    0.323
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.811
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.485
_exptl_crystal_description       Block
_exptl_crystal_F_000             536
_exptl_crystal_size_max          0.170
_exptl_crystal_size_mid          0.170
_exptl_crystal_size_min          0.140
_refine_diff_density_max         0.288
_refine_diff_density_min         -0.261
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.170
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     163
_refine_ls_number_reflns         2298
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.170
_refine_ls_R_factor_all          0.0507
_refine_ls_R_factor_gt           0.0416
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0584P)^2^+0.7954P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1056
_refine_ls_wR_factor_ref         0.1393
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2017
_reflns_number_total             2298
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja6b11835_si_004.cif
_cod_data_source_block           E3
_cod_original_cell_volume        1165.6(14)
_cod_database_code               4125711
_shelx_estimated_absorpt_t_min   0.947
_shelx_estimated_absorpt_t_max   0.956
_shelxl_version_number           2014-3
_shelx_res_checksum              37707
_shelx_hkl_checksum              13303