Low barrier hydrogen bonds in sterically modified Schiff bases
Filarowski, Aleksander; Koll, Aleksander; Glowiak, Tadeusz; Journal of the Chemical Society, Perkin Transactions 2  (2002) 835–; doi:10.1039/b106145n

data_7204214
_publ_section_title
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 Low barrier hydrogen bonds in sterically modified Schiff bases
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_journal_issue                   4
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 2'
_journal_page_first              835
_journal_paper_doi               10.1039/b106145n
_journal_year                    2002
_chemical_formula_sum            'C10 H12 Cl N O'
_chemical_formula_weight         197.66
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.35(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   4.8670(10)
_cell_length_b                   12.082(2)
_cell_length_c                   16.367(3)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      23.8
_cell_measurement_theta_min      12.1
_cell_volume                     962.4(3)
_computing_cell_refinement       'Kuma KM4 software 1987'
_computing_data_collection       'Kuma KM4 software 1987'
_computing_data_reduction        'Kuma KM4 software 1987'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.901
_diffrn_measured_fraction_theta_max 0.901
_diffrn_measurement_device       'Kuma KM4 automatic diffractometer'
_diffrn_measurement_method       'profile data from omega/2theta scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54180
_diffrn_reflns_av_R_equivalents  0.0442
_diffrn_reflns_av_sigmaI/netI    0.0268
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            2228
_diffrn_reflns_theta_full        80.28
_diffrn_reflns_theta_max         80.28
_diffrn_reflns_theta_min         4.55
_exptl_absorpt_coefficient_mu    3.169
_exptl_crystal_density_diffrn    1.364
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             416
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.267
_refine_diff_density_min         -0.324
_refine_diff_density_rms         0.061
_refine_ls_extinction_coef       0.0097(13)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     167
_refine_ls_number_reflns         1993
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0628
_refine_ls_R_factor_gt           0.0463
_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^)+(0.0917P)^2^+0.1093P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1196
_refine_ls_wR_factor_ref         0.1337
_reflns_number_gt                1525
_reflns_number_total             1993
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b106145n.txt
_cod_data_source_block           tium15
_cod_depositor_comments
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The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0917P)^2^+0.1093P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0917P)^2^+0.1093P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
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_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7204214