Effect of pressure on methylated glycine derivatives: relative roles of hydrogen bonds and steric repulsion of methyl groups
Kapustin, Eugene A.; Minkov, Vasily S.; Boldyreva, Elena V.; Acta Crystallographica Section B 70 (2014) 517–532; doi:10.1107/S205252061401035X

data_2105853
_publ_section_title
;
 Effect of pressure on methylated glycine derivatives: relative roles of
 hydrogen bonds and steric repulsion of methyl groups
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              517
_journal_page_last               532
_journal_paper_doi               10.1107/S205252061401035X
_journal_volume                  70
_journal_year                    2014
_chemical_formula_moiety         'C5 H11 N O2'
_chemical_formula_sum            'C5 H11 N O2'
_chemical_formula_weight         117.15
_chemical_name_common            N,N,N-trimethylglycine
_chemical_name_systematic
;
 2-(trimethylamino)acetic acid
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.486(7)
_cell_length_b                   6.7327(4)
_cell_length_c                   5.9227(3)
_cell_measurement_pressure       800000
_cell_measurement_reflns_used    2305
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      23.25
_cell_measurement_theta_min      3.72
_cell_volume                     577.6(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 10.3457
_diffrn_measured_fraction_theta_full 0.410
_diffrn_measured_fraction_theta_max 0.410
_diffrn_measurement_device_type  'Oxford Gemini Ultra R'
_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  0.0719
_diffrn_reflns_av_sigmaI/netI    0.0361
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            2305
_diffrn_reflns_theta_full        23.25
_diffrn_reflns_theta_max         23.25
_diffrn_reflns_theta_min         3.72
_exptl_absorpt_coefficient_mu    0.103
_exptl_absorpt_correction_T_max  0.474
_exptl_absorpt_correction_T_min  0.388
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
'R. J. Angel, J. Appl. Cryst. (2004). 37, 486-492'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.347
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             256
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.089
_refine_diff_density_min         -0.089
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     55
_refine_ls_number_reflns         186
_refine_ls_number_restraints     44
_refine_ls_restrained_S_all      0.919
_refine_ls_R_factor_all          0.0543
_refine_ls_R_factor_gt           0.0336
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0440P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0659
_refine_ls_wR_factor_ref         0.0706
_reflns_number_gt                137
_reflns_number_total             186
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            xk5018sup1.cif
_cod_data_source_block           Betaine-0.8GPa
_cod_database_code               2105853
_cod_database_fobs_code          2105853