Perpetually self-propelling chiral single crystals.
Panda, Manas K.; Runčevski, Tomče; Husain, Ahmad; Dinnebier, Robert E.; Naumov, Panče; Journal of the American Chemical Society 137 (2015) 1895–1902; doi:10.1021/ja5111927

data_4123375
_publ_section_title
;
 Perpetually self-propelling chiral single crystals.
;
_journal_issue                   5
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              1895
_journal_page_last               1902
_journal_paper_doi               10.1021/ja5111927
_journal_volume                  137
_journal_year                    2015
_chemical_absolute_configuration L
_chemical_formula_moiety         'C5 H7 N O3'
_chemical_formula_sum            'C5 H7 N O3'
_chemical_formula_weight         129.12
_chemical_name_common            'L-pyroglutamic acid'
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            12
_cell_length_a                   9.0010(5)
_cell_length_b                   13.3871(8)
_cell_length_c                   14.6429(8)
_cell_measurement_reflns_used    9354
_cell_measurement_temperature    250(2)
_cell_measurement_theta_max      32.67
_cell_measurement_theta_min      2.66
_cell_volume                     1764.43(17)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics
'X-SEED (Barbour, 2001; Atwood & Barbour, 2003)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      250(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.955
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0179
_diffrn_reflns_av_unetI/netI     0.0185
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.955
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            26128
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.942
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         35.258
_diffrn_reflns_theta_min         2.061
_exptl_absorpt_coefficient_mu    0.122
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.458
_exptl_crystal_description       rod
_exptl_crystal_F_000             816
_exptl_crystal_size_max          0.500
_exptl_crystal_size_mid          0.300
_exptl_crystal_size_min          0.180
_exptl_transmission_factor_max   0.7469
_exptl_transmission_factor_min   0.6859
_refine_diff_density_max         0.829
_refine_diff_density_min         -0.333
_refine_diff_density_rms         0.054
_refine_ls_abs_structure_details
;
 Flack x determined using 2287 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     244
_refine_ls_number_reflns         7466
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0669
_refine_ls_R_factor_gt           0.0502
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0934P)^2^+0.1025P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1387
_refine_ls_wR_factor_ref         0.1494
_reflns_Friedel_coverage         0.773
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.926
_reflns_number_gt                5916
_reflns_number_total             7466
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja5111927_si_018.cif
_cod_data_source_block           LPGA250K
_cod_depositor_comments
'Adding full bibliography for 4123369--4123385.cif.'
_cod_database_code               4123375
_shelx_estimated_absorpt_t_min   0.942
_shelx_estimated_absorpt_t_max   0.978
_shelxl_version_number           2013-4
_shelx_res_checksum              52736
_shelx_hkl_checksum              52052