Invitation to Submit: The Cambridge Structural Database Structural Similarity in Chiral-Achiral Multi-Component Crystals
Scowen, Ian J.; Alomar, Taghrid Saad; Munshi, Tasnim; Seaton, Colin Cormack; CrystEngComm  (2020) –; doi:10.1039/D0CE00301H

data_7240318
_publ_section_title
;
 Invitation to Submit: The Cambridge Structural Database Structural
 Similarity in Chiral-Achiral Multi-Component Crystals
;
_journal_name_full               CrystEngComm
_journal_paper_doi               10.1039/D0CE00301H
_journal_year                    2020
_chemical_formula_sum            'C10 H12 N2 O6'
_chemical_formula_weight         256.21
_chemical_name_common
;
(DL)-malic acid nicotinamide
;
_chemical_name_systematic
; 
 (R, S)-2-hydroxysuccinic acid nicotinamide 
;
_space_group_IT_number           29
_space_group_name_Hall           'P 2c -2ac'
_space_group_name_H-M_alt        'P c a 21'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   'P c a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2020-02-28 deposited with the CCDC.	2020-04-15 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   18.629(3)
_cell_length_b                   5.2842(8)
_cell_length_c                   22.841(4)
_cell_measurement_reflns_used    4167
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      22.51
_cell_measurement_theta_min      2.36
_cell_volume                     2248.5(6)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.864
_diffrn_measured_fraction_theta_max 0.864
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0537
_diffrn_reflns_av_sigmaI/netI    0.0491
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            16447
_diffrn_reflns_theta_full        24.66
_diffrn_reflns_theta_max         24.66
_diffrn_reflns_theta_min         2.19
_exptl_absorpt_coefficient_mu    0.127
_exptl_absorpt_correction_T_max  0.7451
_exptl_absorpt_correction_T_min  0.6677
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS - Bruker AXS, Madison WI'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.514
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1072
_exptl_crystal_size_max          0.204
_exptl_crystal_size_mid          0.110
_exptl_crystal_size_min          0.078
_refine_diff_density_max         0.263
_refine_diff_density_min         -0.284
_refine_diff_density_rms         0.059
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -1.2(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.080
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     335
_refine_ls_number_reflns         3047
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.080
_refine_ls_R_factor_all          0.0631
_refine_ls_R_factor_gt           0.0477
_refine_ls_shift/su_max          0.009
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0638P)^2^+1.3125P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1130
_refine_ls_wR_factor_ref         0.1197
_reflns_number_gt                2538
_reflns_number_total             3047
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d0ce00301h2.cif
_cod_data_source_block           tai_17_3b_t
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Orthorhombic' was changed
to 'orthorhombic' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

data item '_exptl_crystal_density_meas' value 'not measured' was
changed to '?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 

2024-12-16
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel
;
_cod_original_sg_symbol_H-M      Pca2(1)
_cod_original_formula_sum        'C20 H24 N4 O12'
_cod_original_formula_units_Z    4
_cod_original_formula_weight     512.43
_cod_database_code               7240318