X-ray studies on crystalline complexes involving amino acids and peptides. XXXIX. Crystal structures of malonic acid complexes of <small>DL</small>- and <small>L</small>-histidine. Preservation of aggregation pattern on reversal of chirality
Saraswathi, N.T.; Vijayan, M.; Acta Crystallographica Section B 58 (2002) 734–739; doi:10.1107/S0108768102008819

data_2103322
_publ_section_title
;
 X-ray studies on crystalline complexes involving amino acids and
 peptides. XXXIX. Crystal structures of malonic acid complexes of
 <small>DL</small>- and <small>L</small>-histidine. Preservation of
 aggregation pattern on reversal of chirality
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              734
_journal_page_last               739
_journal_paper_doi               10.1107/S0108768102008819
_journal_volume                  58
_journal_year                    2002
_chemical_formula_moiety         <C9H13N3O6>
_chemical_formula_sum            'C18 H26 N6 O12'
_chemical_formula_weight         259.1
_chemical_name_common            DL-Histidine-Malonicacid-complex
_chemical_name_systematic
;
 ?
;
_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                 96.202(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.3643(10)
_cell_length_b                   25.3538(6)
_cell_length_c                   8.3043(14)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      30
_cell_measurement_theta_min      18
_cell_volume                     1122.8(3)
_computing_cell_refinement       CAD4
_computing_data_collection       CAD4
_computing_data_reduction        Molen
_computing_molecular_graphics    'ORTEP III'
_computing_publication_material  MSWORD
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full .993
_diffrn_measured_fraction_theta_max .993
_diffrn_measurement_device_type  CAD4
_diffrn_measurement_method       \w--2\q
_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  0.0243
_diffrn_reflns_av_sigmaI/netI    0.0234
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            2364
_diffrn_reflns_theta_full        69.92
_diffrn_reflns_theta_max         69.92
_diffrn_reflns_theta_min         3.49
_diffrn_standards_interval_time  60
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    1.126
_exptl_absorpt_correction_T_max  0.9991
_exptl_absorpt_correction_T_min  0.9038
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'North et al .. 1968'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.533
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platy
_exptl_crystal_F_000             544
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.05
_refine_diff_density_max         .244
_refine_diff_density_min         -.203
_refine_ls_extinction_coef       0.0025(5)
_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   1.050
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     169
_refine_ls_number_reflns         2135
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0482
_refine_ls_R_factor_gt           0.0367
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0514P)^2^+0.4527P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0945
_refine_ls_wR_factor_ref         0.1061
_reflns_number_gt                1760
_reflns_number_total             2135
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            de0016.cif
_cod_data_source_block           DL
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Empirical' changed to
'empirical' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Empirical'
changed to 'empirical' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               2103322
_cod_database_fobs_code          2103322