Crystal structures of natural amino acid perhydrates
Prikhodchenko, Petr V.; Medvedev, Alexander G.; Tripol'skaya, Tatiana A.; Churakov, Andrei V.; Wolanov, Yitzhak; Howard, Judith A. K.; Lev, Ovadia; CrystEngComm 13 (2011) 2399–; doi:10.1039/c0ce00481b

data_7205609
_publ_section_title
;
 Crystal structures of natural amino acid perhydrates
;
_journal_issue                   7
_journal_name_full               CrystEngComm
_journal_page_first              2399
_journal_paper_doi               10.1039/c0ce00481b
_journal_volume                  13
_journal_year                    2011
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C6 H13 N O2, H2 O2, 0.5(H2 O)'
_chemical_formula_sum            'C6 H16 N O4.5'
_chemical_formula_weight         174.20
_chemical_name_common
;(2S,3S)-2-Amino-3-methylpentanoic acid hydrogen peroxide
solvate hemihydrate
;
_chemical_name_systematic
;
(2S,3S)-2-Amino-3-methylpentanoic acid
hydrogen peroxide solvate hemihydrate
;
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 91.839(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.0728(7)
_cell_length_b                   7.3940(6)
_cell_length_c                   12.1940(7)
_cell_measurement_reflns_used    2314
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      29.872
_cell_measurement_theta_min      3.343
_cell_volume                     907.72(11)
_computing_cell_refinement       'SAINT (Bruker, 2003)'
_computing_data_collection       'SMART (Bruker, 2003)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Bruker, 2003)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker SMART 1K'
_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  0.0270
_diffrn_reflns_av_sigmaI/netI    0.0293
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            3592
_diffrn_reflns_theta_full        28.49
_diffrn_reflns_theta_max         28.49
_diffrn_reflns_theta_min         3.34
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_T_max  0.9968
_exptl_absorpt_correction_T_min  0.9561
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.275
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             380
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.267
_refine_diff_density_min         -0.167
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     131
_refine_ls_number_reflns         1237
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0351
_refine_ls_R_factor_gt           0.0295
_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^)+(0.0432P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0671
_refine_ls_wR_factor_ref         0.0691
_reflns_number_gt                1123
_reflns_number_total             1237
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c0ce00481b.txt
_cod_data_source_block           Ile50
_cod_depositor_comments
;

2018-06-26
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel
;
_cod_original_sg_symbol_H-M      'C 2'
_cod_original_formula_moiety     '2(C6 H13 N O2), 2(H2 O2), H2 O'
_cod_original_formula_sum        'C12 H32 N2 O9'
_cod_original_formula_units_Z    2
_cod_original_formula_weight     348.40
_cod_database_code               7205609