A second tricilinc polymorph of 6,6'-diethoxy-2,2'-[propane-1,2-diylbis(nitrilomethylidyne)]diphenol
Fun, Hoong-Kun; Kia, Reza; Kargar, Hadi; Jamshidvand, Arezoo; Acta Crystallographica Section E 65 (2009) o722–o723; doi:10.1107/S1600536809008137

data_2221245
_publ_section_title
;
 A second tricilinc polymorph of
 6,6'-diethoxy-2,2'-[propane-1,2-diylbis(nitrilomethylidyne)]diphenol
;
_journal_coeditor_code           AT2736
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o722
_journal_page_last               o723
_journal_paper_doi               10.1107/S1600536809008137
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C21 H26 N2 O4'
_chemical_formula_moiety         'C21 H26 N2 O4'
_chemical_formula_sum            'C21 H26 N2 O4'
_chemical_formula_weight         370.44
_chemical_name_systematic
;
6,6'-diethoxy-2,2'-[propane-1,2-diylbis(nitrilomethylidyne)]diphenol
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                107.4320(10)
_cell_angle_beta                 108.4870(10)
_cell_angle_gamma                95.9790(10)
_cell_formula_units_Z            2
_cell_length_a                   8.9729(2)
_cell_length_b                   10.7008(4)
_cell_length_c                   11.3633(2)
_cell_measurement_reflns_used    9912
_cell_measurement_temperature    100
_cell_measurement_theta_max      33.91
_cell_measurement_theta_min      2.45
_cell_volume                     963.03(5)
_computing_cell_refinement       'SAINT (Bruker, 2005)'
_computing_data_collection       'APEX2 (Bruker, 2005)'
_computing_data_reduction        'SAINT (Bruker, 2005)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material
;
SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009)
;
_computing_structure_refinement  'SHELXTL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      100
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type
;
Bruker SMART APEXII 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  0.0261
_diffrn_reflns_av_sigmaI/netI    0.0249
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            19581
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         30.00
_diffrn_reflns_theta_min         2.02
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  0.9783
_exptl_absorpt_correction_T_min  0.9516
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(<i>SADABS</i>; Bruker, 2005)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.277
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             396
_exptl_crystal_size_max          0.56
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.533
_refine_diff_density_min         -0.228
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     249
_refine_ls_number_reflns         5527
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0522
_refine_ls_R_factor_gt           0.0447
_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^)+(0.0795P)^2^+0.2658P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1249
_refine_ls_wR_factor_ref         0.1357
_reflns_number_gt                4721
_reflns_number_total             5527
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            at2736.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 'Triclinic' changed to 'triclinic'
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_database_code               2221245
_cod_database_fobs_code          2221245