Molecular aggregation in crystalline 1:1 complexes of hydrophobic <small>D</small>- and <small>L</small>-amino acids. I. The <small>L</small>-isoleucine series
Dalhus, Bjørn; Görbitz, Carl Henrik; Acta Crystallographica Section B 55 (1999) 424–431; doi:10.1107/S0108768198013494

data_2003101
_publ_section_title
;
 Molecular aggregation in crystalline 1:1 complexes of hydrophobic
 <small>D</small>- and <small>L</small>-amino acids. I. The
 <small>L</small>-isoleucine series
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              424
_journal_page_last               431
_journal_paper_doi               10.1107/S0108768198013494
_journal_volume                  55
_journal_year                    1999
_chemical_formula_sum            'C12 H26 N2 O4'
_chemical_formula_weight         262.35
_chemical_name_systematic
;
  L-Isoleucine:D-Norleucine
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 98.38(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.012(2)
_cell_length_b                   4.7227(9)
_cell_length_c                   30.335(6)
_cell_measurement_reflns_used    8192
_cell_measurement_temperature    150(2)
_cell_volume                     1419.0(5)
_computing_cell_refinement       'SAINT (Siemens, 1995)'
_computing_data_collection       'SMART (Siemens, 1995)'
_computing_data_reduction        'SAINT (Siemens, 1995)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 1994)'
_computing_structure_solution    'SHELXTL (Sheldrick, 1994)'
_diffrn_ambient_temperature      150(2)
_diffrn_measurement_device
'Siemens SMART CCD area-detector diffractometer'
_diffrn_measurement_method       \w
_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  0.0250
_diffrn_reflns_av_sigmaI/netI    0.0415
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       49
_diffrn_reflns_limit_l_min       -54
_diffrn_reflns_number            25110
_diffrn_reflns_theta_max         40.41
_diffrn_reflns_theta_min         3.39
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.986
_exptl_absorpt_correction_T_min  0.951
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sheldrick (1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.228
_exptl_crystal_description       plate
_exptl_crystal_F_000             576
_exptl_crystal_size_max          0.55
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.512
_refine_diff_density_min         -0.262
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.2(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.119
_refine_ls_goodness_of_fit_obs   1.143
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     399
_refine_ls_number_reflns         14651
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.119
_refine_ls_restrained_S_obs      1.143
_refine_ls_R_factor_all          0.0621
_refine_ls_R_factor_obs          0.0482
_refine_ls_shift/esd_max         0.008
_refine_ls_shift/esd_mean        0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0427P)^2^+0.2719P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1183
_refine_ls_wR_factor_obs         0.1109
_reflns_number_observed          12393
_reflns_number_total             14651
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            os0011.cif
_cod_data_source_block           L4
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0427P)^2^+0.2719P] 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^)+(0.0427P)^2^+0.2719P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        1419.1(5)
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               2003101