3,6,14,17-Tetraoxa-23,24-diazatricyclo[17.3.1.1^8.12^]tetracosa-1(23),8,10,12(24),19,21-hexaene (bis-pyridino-18-crown-6)
Cheng-Juan Li; Jian-Min Dou; Da-Cheng Li; Da-Qi Wang; Acta Crystallographica Section E 62 (2006) o416–o417; doi:10.1107/S1600536805042522

data_2208168
_publ_section_title
;3,6,14,17-Tetraoxa-23,24-diazatricyclo[17.3.1.1^8.12^]tetracosa-1(23),8,10,12(24),19,21-hexaene
 (bis-pyridino-18-crown-6)
;
_journal_coeditor_code           SJ6178
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o416
_journal_page_last               o417
_journal_paper_doi               10.1107/S1600536805042522
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C18 H22 N2 O4'
_chemical_formula_moiety         'C18 H22 N2 O4'
_chemical_formula_sum            'C18 H22 N2 O4'
_chemical_formula_weight         330.38
_chemical_melting_point          .418E-305
_chemical_name_common            bis-pyridino-18-crown-6
_chemical_name_systematic
;
3,6,14,17-Tetraoxa-23,24-diazatricyclo[17.3.1.1^8.12^]tetracosa-
1(23),8,10,12(24),19,21-hexaene
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.797(4)
_cell_length_b                   7.2616(19)
_cell_length_c                   15.191(4)
_cell_measurement_reflns_used    3983
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      25.03
_cell_measurement_theta_min      2.68
_cell_volume                     1632.3(7)
_computing_cell_refinement       'SAINT (Siemens, 1996)'
_computing_data_collection       'SMART (Siemens, 1996)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1997b)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997a)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997a)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Siemens SMART CCD area-detector'
_diffrn_measurement_method       '\f and \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  0.0215
_diffrn_reflns_av_sigmaI/netI    0.0138
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            7873
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.68
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.096
_exptl_absorpt_correction_T_max  0.9619
_exptl_absorpt_correction_T_min  0.9511
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.344
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.53
_exptl_crystal_size_mid          0.48
_exptl_crystal_size_min          0.41
_refine_diff_density_max         0.156
_refine_diff_density_min         -0.162
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.074
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     109
_refine_ls_number_reflns         1449
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.074
_refine_ls_R_factor_all          0.0429
_refine_ls_R_factor_gt           0.0344
_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^)+(0.044P)^2^+0.3434P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0846
_refine_ls_wR_factor_ref         0.0922
_reflns_number_gt                1198
_reflns_number_total             1449
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sj6178.cif
_cod_data_source_block           I
_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 

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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1632.2(7)
_cod_database_code               2208168
_cod_database_fobs_code          2208168