The Oxamate Anion: A Flexible Building Block of Hydrogen-Bonded Architectures for Crystal Engineering
Christer B. Aakeröy; Deirdre P. Hughes; Mark Nieuwenhuyzen; Journal of the American Chemical Society 118 (1996) 10134–10140; doi:10.1021/ja953296v

data_4117190
_publ_section_title
;
 The Oxamate Anion: A Flexible Building Block of Hydrogen-Bonded
 Architectures for Crystal Engineering
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              10134
_journal_page_last               10140
_journal_paper_doi               10.1021/ja953296v
_journal_volume                  118
_journal_year                    1996
_chemical_formula_sum            'C9 H11 Cl N2 O3'
_chemical_formula_weight         230.65
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 92.820(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   15.6740(10)
_cell_length_b                   12.1290(10)
_cell_length_c                   11.429(2)
_cell_measurement_reflns_used    35
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      10
_cell_volume                     2170.1(4)
_computing_cell_refinement       'XSCANS (Siemens, 1995)'
_computing_data_collection       'XSCANS (Siemens, 1995)'
_computing_data_reduction        'XSCANS (Siemens, 1995)'
_computing_molecular_graphics    'SHELXTL PC (Sheldrick, 1990)'
_computing_publication_material  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measurement_device       'Siemens P4'
_diffrn_measurement_method       '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  0.0176
_diffrn_reflns_av_sigmaI/netI    0.0475
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            3002
_diffrn_reflns_theta_max         22.50
_diffrn_reflns_theta_min         2.12
_diffrn_standards_decay_%        1%
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.341
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.412
_exptl_crystal_description       Block
_exptl_crystal_F_000             960
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.267
_refine_diff_density_min         -0.244
_refine_diff_density_rms         0.044
_refine_ls_extinction_coef       none
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.054
_refine_ls_goodness_of_fit_obs   1.119
_refine_ls_hydrogen_treatment    'Located from Fourier, Riding model'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         2829
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.058
_refine_ls_restrained_S_obs      1.119
_refine_ls_R_factor_all          0.0903
_refine_ls_R_factor_obs          0.0471
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0495P)^2^+0.8167P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1171
_refine_ls_wR_factor_obs         0.0972
_reflns_number_observed          1840
_reflns_number_total             2830
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            ja953296v_4.cif
_cod_data_source_block           4clboxam
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0495P)^2^+0.8167P] 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^)+(0.0495P)^2^+0.8167P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_database_code               4117190