Polymorphic transition due to grinding: the case of 3-[1-(<i>tert</i>-butoxycarbonyl)azetidin-3-yl]-1,2-oxazole-4-carboxylic acid
Konovalova, Irina S.; Shaposhnyk, Anna M.; Baumer, Vyacheslav N.; Chalyk, Bohdan A.; Shishkina, Svitlana V.; Acta Crystallographica Section B 78 (2022) –; doi:10.1107/S2052520622003900

data_2108996
_publ_section_title
;
 Polymorphic transition due to grinding: the case of
 3-[1-(<i>tert</i>-butoxycarbonyl)azetidin-3-yl]-1,2-oxazole-4-carboxylic
 acid
;
_journal_coeditor_code           LO5096
_journal_issue                   '3 Part 2'
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first
;
;
_journal_paper_doi               10.1107/S2052520622003900
_journal_volume                  78
_journal_year                    2022
_chemical_formula_moiety         'C12 H16 N2 O5'
_chemical_formula_sum            'C12 H16 N2 O5'
_chemical_formula_weight         268.27
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2016/6
_cell_angle_alpha                90
_cell_angle_beta                 101.948(7)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   16.0117(9)
_cell_length_b                   9.6657(9)
_cell_length_c                   17.4382(9)
_cell_measurement_reflns_used    2536
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.112
_cell_measurement_theta_min      3.153
_cell_volume                     2640.3(3)
_computing_molecular_graphics    'Mercury 3.1 (Macrae et al., 2008)'
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2015b)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2015a)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 16.1827
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Xcalibur, Sapphire3'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0393
_diffrn_reflns_av_unetI/netI     0.0351
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            8636
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        24.996
_diffrn_reflns_theta_max         24.996
_diffrn_reflns_theta_min         2.864
_diffrn_source                   'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.81498
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlis RED, Agilent Technologies,
Version 1.171.36.24 (release 03-12-2012 CrysAlis171 .NET)
(compiled Dec  3 2012,18:21:49)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.350
_exptl_crystal_description       block
_exptl_crystal_F_000             1136
_exptl_crystal_size_max          0.050
_exptl_crystal_size_mid          0.040
_exptl_crystal_size_min          0.030
_refine_diff_density_max         0.189
_refine_diff_density_min         -0.168
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     179
_refine_ls_number_reflns         2322
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0724
_refine_ls_R_factor_gt           0.0426
_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^)+(0.0430P)^2^+1.7721P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0950
_refine_ls_wR_factor_ref         0.1086
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1625
_reflns_number_total             2322
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            lo5096sup1.cif
_cod_data_source_block           1a
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2108996
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.995
_shelx_estimated_absorpt_t_max   0.997
_shelx_res_checksum              898
_shelx_hkl_checksum              32844