Bis-lactim ethers of cyclic dipeptides. 1. Compounds derived from <i>cyclo</i>(Gly-<small>L</small>-Val)
Bolte, Michael; Benecke, Bernd; Egert, Ernst; Acta Crystallographica Section C 55 (1999) 964–968; doi:10.1107/S0108270199001304

data_2008635
_publ_section_title
;
 Bis-lactim ethers of cyclic dipeptides. 1. Compounds derived from
 <i>cyclo</i>(Gly-<small>L</small>-Val)
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              964
_journal_page_last               968
_journal_paper_doi               10.1107/S0108270199001304
_journal_volume                  55
_journal_year                    1999
_chemical_formula_sum            'C19 H27 N3 O6'
_chemical_formula_weight         393.44
_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'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 100.42(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.880(2)
_cell_length_b                   6.748(2)
_cell_length_c                   17.730(4)
_cell_measurement_reflns_used    50
_cell_measurement_temperature    293
_cell_measurement_theta_max      15
_cell_measurement_theta_min      10
_cell_volume                     1044.9(5)
_computing_cell_refinement       D4
_computing_data_collection       'D4 (Clegg, 1981)'
_computing_data_reduction        'REDU4 (Stoe & Cie, 1988)'
_computing_molecular_graphics    'XP (Sheldrick, 1991)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS86 (Sheldrick, 1985)'
_diffrn_ambient_temperature      293
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'STOE Siemens four-circle diffractometer'
_diffrn_measurement_method       '\w-\q scans with learnt profile (Clegg, 1981)'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0307
_diffrn_reflns_av_sigmaI/netI    0.0720
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       1
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2278
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         3.50
_diffrn_standards_decay_%        5
_diffrn_standards_interval_time  120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.250
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             420
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.192
_refine_diff_density_min         -0.212
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.126
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     253
_refine_ls_number_reflns         2210
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.125
_refine_ls_R_factor_all          0.1453
_refine_ls_R_factor_gt           0.0694
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0628P)^2^+0.1709P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.1701
_reflns_number_gt                1239
_reflns_number_total             2210
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk1254.cif
_cod_data_source_block           II
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               2008635
_cod_database_fobs_code          2008635