<small>L</small>-Isoleucyl-<small>L</small>-serine 0.33-hydrate, <small>L</small>-phenylalanyl-<small>L</small>-serine and <small>L</small>-methionyl-<small>L</small>-serine 0.34-hydrate
Görbitz, Carl Henrik; Bruvoll, Marius; Dizdarevic, Selma; Fimland, Nina; Hafizovic, Jasmina; Kalfjøs, Helen Therese; Krivokapic, Alexander; Vestli, Kristian; Acta Crystallographica Section C 62 (2006) o22–o25; doi:10.1107/S0108270105038928

data_2014328
_publ_section_title
;
 <small>L</small>-Isoleucyl-<small>L</small>-serine 0.33-hydrate,
 <small>L</small>-phenylalanyl-<small>L</small>-serine and
 <small>L</small>-methionyl-<small>L</small>-serine 0.34-hydrate
;
_journal_coeditor_code           FG1882
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o22
_journal_page_last               o25
_journal_paper_doi               10.1107/S0108270105038928
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C12 H16 N2 O4'
_chemical_formula_moiety         'C12 H16 N2 O4'
_chemical_formula_sum            'C12 H16 N2 O4'
_chemical_formula_weight         252.27
_chemical_name_systematic
;
  L-phenylalanyl-L-serine
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 93.754(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.6434(7)
_cell_length_b                   5.7609(5)
_cell_length_c                   13.4396(12)
_cell_measurement_reflns_used    3332
_cell_measurement_temperature    105(2)
_cell_measurement_theta_max      37.02
_cell_measurement_theta_min      1.52
_cell_volume                     590.51(9)
_computing_cell_refinement       'SAINT-Plus (Bruker, 2001)'
_computing_data_collection       'SMART (Bruker, 1998)'
_computing_data_reduction        SAINT-Plus
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Bruker, 2000)'
_diffrn_ambient_temperature      105(2)
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.739
_diffrn_measurement_device_type  'Siemens 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  0.0188
_diffrn_reflns_av_sigmaI/netI    0.0252
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            5381
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         37.02
_diffrn_reflns_theta_min         1.52
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.107
_exptl_absorpt_correction_T_max  0.9841
_exptl_absorpt_correction_T_min  0.8204
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.419
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             268
_exptl_crystal_size_max          0.70
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.346
_refine_diff_density_min         -0.206
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     178
_refine_ls_number_reflns         2392
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0329
_refine_ls_R_factor_gt           0.0307
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0562P)^2^+0.0336P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0826
_refine_ls_wR_factor_ref         0.0840
_reflns_number_gt                2268
_reflns_number_total             2392
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fg1882.cif
_cod_data_source_block           FS
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               2014328
_cod_database_fobs_code          2014328