<i>N</i>,<i>N</i>'-Bis(4-methylphenyl)-3-oxapentanediamide
Yong-Hong Wen; Hui-Ling Wen; Xue-Mei Li; Shu-Sheng Zhang; Acta Crystallographica Section E 62 (2006) o1861–o1862; doi:10.1107/S1600536806012797

data_2208917
_publ_section_title
;
 <i>N</i>,<i>N</i>'-Bis(4-methylphenyl)-3-oxapentanediamide
;
_journal_coeditor_code           IS2023
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1861
_journal_page_last               o1862
_journal_paper_doi               10.1107/S1600536806012797
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C18 H20 N2 O3'
_chemical_formula_moiety         'C18 H20 N2 O3'
_chemical_formula_sum            'C18 H20 N2 O3'
_chemical_formula_weight         312.36
_chemical_name_systematic
;
N,N'-Bis(4-methylphenyl)-3-oxapentanediamide
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.299(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   29.059(3)
_cell_length_b                   6.2798(7)
_cell_length_c                   8.9209(10)
_cell_measurement_reflns_used    1687
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.6
_cell_measurement_theta_min      2.8
_cell_volume                     1627.9(3)
_computing_cell_refinement       'SAINT (Siemens, 1996)'
_computing_data_collection       'SMART (Siemens, 1996)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL
_computing_publication_material
;
SHELXTL, PARST (Nardelli, 1995) and PLATON (Spek, 2003)
;
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type
;
Siemens SMART 1000 CCD area-detector
;
_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  0.0184
_diffrn_reflns_av_sigmaI/netI    0.0190
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -35
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            4509
_diffrn_reflns_theta_full        26.02
_diffrn_reflns_theta_max         26.02
_diffrn_reflns_theta_min         2.80
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.9904
_exptl_absorpt_correction_T_min  0.9717
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            dark-brown
_exptl_crystal_density_diffrn    1.274
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       column
_exptl_crystal_F_000             664
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.174
_refine_diff_density_min         -0.153
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     105
_refine_ls_number_reflns         1606
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0546
_refine_ls_R_factor_gt           0.0445
_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^)+(0.0709P)^2^+0.5191P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1244
_refine_ls_wR_factor_ref         0.1331
_reflns_number_gt                1278
_reflns_number_total             1606
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            is2023.cif
_cod_data_source_block           I
_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 

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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               2208917
_cod_database_fobs_code          2208917