<i>N</i>-(<small>L</small>-2-Aminobutyryl)-<small>L</small>-alanine and 2-(<small>L</small>-alanylamino)-<small>L</small>-butyric acid 0.33-hydrate
Görbitz, Carl Henrik; Acta Crystallographica Section C 58 (2002) o533–o536; doi:10.1107/S0108270102011691

data_2012874
_publ_section_title
;
 <i>N</i>-(<small>L</small>-2-Aminobutyryl)-<small>L</small>-alanine
 and 2-(<small>L</small>-alanylamino)-<small>L</small>-butyric acid
 0.33-hydrate
;
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o533
_journal_page_last               o536
_journal_paper_doi               10.1107/S0108270102011691
_journal_volume                  58
_journal_year                    2002
_chemical_formula_moiety         'C7 H14 N2 O3'
_chemical_formula_sum            'C7 H14 N2 O3'
_chemical_formula_weight         174.20
_chemical_name_systematic
;
N-(L-2-aminobutyryl)-L-alanine
;
_space_group_IT_number           79
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'I 4'
_symmetry_space_group_name_H-M   'I 4'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   17.9290(12)
_cell_length_b                   17.9290(12)
_cell_length_c                   5.2196(5)
_cell_measurement_reflns_used    3540
_cell_measurement_temperature    105(2)
_cell_measurement_theta_max      27.09
_cell_measurement_theta_min      1.61
_cell_volume                     1677.8(2)
_computing_cell_refinement       'SAINT (Bruker, 1998)'
_computing_data_collection       'SMART (Bruker, 1998)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Bruker, 2000)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method
'Sets of exposures each taken over 0.3\% \w rotation'
_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  0.041
_diffrn_reflns_av_sigmaI/netI    0.024
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            5085
_diffrn_reflns_theta_full        27.09
_diffrn_reflns_theta_max         27.09
_diffrn_reflns_theta_min         1.61
_diffrn_standards_decay_%        none
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_T_max  0.995
_exptl_absorpt_correction_T_min  0.932
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.379
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             752
_exptl_crystal_size_max          0.65
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.36
_refine_diff_density_min         -0.39
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.267
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     121
_refine_ls_number_reflns         1029
_refine_ls_number_restraints     13
_refine_ls_restrained_S_all      1.261
_refine_ls_R_factor_all          0.081
_refine_ls_R_factor_gt           0.079
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0203P)^2^+13.6465P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.179
_refine_ls_wR_factor_ref         0.180
_reflns_number_gt                1001
_reflns_number_total             1029
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            gd1209.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:

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

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_database_code               2012874
_cod_database_fobs_code          2012874