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_2008636
_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            'C14 H24 N2 O4'
_chemical_formula_weight         284.35
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                   8.5140(10)
_cell_length_b                   9.3010(10)
_cell_length_c                   20.119(2)
_cell_measurement_reflns_used    50
_cell_measurement_temperature    293
_cell_measurement_theta_max      15
_cell_measurement_theta_min      10
_cell_volume                     1593.2(3)
_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(2)
_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  0.0189
_diffrn_reflns_av_sigmaI/netI    0.0201
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            3028
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         3.75
_diffrn_standards_decay_%        4
_diffrn_standards_interval_time  120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.185
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             616
_exptl_crystal_size_max          0.80
_exptl_crystal_size_mid          0.70
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.194
_refine_diff_density_min         -0.186
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    'H atom parameters constrained'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     182
_refine_ls_number_reflns         2777
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.0481
_refine_ls_R_factor_gt           0.0436
_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^)+(0.0719P)^2^+0.2809P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.1210
_reflns_number_gt                2512
_reflns_number_total             2777
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk1254.cif
_cod_data_source_block           III
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 
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_cod_database_code               2008636
_cod_database_fobs_code          2008636