(1<i>R</i>,2<i>R</i>)-Bis(4-pyridylmethyleneamino)cyclohexane
Xue-Jun Yuan; Yi-Zhi Li; Yong-Jiang Liu; Yun-Qi Tian; Xiao-Zeng You; Acta Crystallographica Section E 58 (2002) o640–o641; doi:10.1107/S160053680200822X

data_2201209
_publ_section_title
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 (1<i>R</i>,2<i>R</i>)-Bis(4-pyridylmethyleneamino)cyclohexane
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o640
_journal_page_last               o641
_journal_paper_doi               10.1107/S160053680200822X
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'C18 H20 N4'
_chemical_formula_moiety         'C18 H20 N4'
_chemical_formula_sum            'C18 H20 N4'
_chemical_formula_weight         292.38
_chemical_melting_point          408.0(10)
_chemical_name_systematic
;
(1R,2R)-Bis(4-pyridylmethyleneamino)cyclohexane
;
_space_group_IT_number           18
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2 2ab'
_symmetry_space_group_name_H-M   'P 21 21 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   15.230(4)
_cell_length_b                   5.7890(10)
_cell_length_c                   9.415(2)
_cell_measurement_reflns_used    1006
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.50
_cell_measurement_theta_min      2.55
_cell_volume                     830.1(3)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 1997)'
_computing_data_reduction        'SHELXTL (Bruker, 1997)'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    SHELXTL
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker CCD area-detector'
_diffrn_measurement_method       '\f and \w'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0512
_diffrn_reflns_av_sigmaI/netI    0.0361
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            4258
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.16
_exptl_absorpt_coefficient_mu    0.072
_exptl_absorpt_correction_T_max  0.986
_exptl_absorpt_correction_T_min  0.983
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.170
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             312
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.128
_refine_diff_density_min         -0.257
_refine_ls_abs_structure_details 'Flack (1983); 584 Friedel pairs'
_refine_ls_abs_structure_Flack   0.0018(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     100
_refine_ls_number_reflns         1473
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.014
_refine_ls_R_factor_all          0.0585
_refine_ls_R_factor_gt           0.0532
_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^)+(0.1P)^2^] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1391
_refine_ls_wR_factor_ref         0.1432
_reflns_number_gt                1288
_reflns_number_total             1473
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ww6018.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:

'_chemical_melting_point' value '407-409' was changed to '408.0(10)'
- the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_chemical_melting_point' value '407-409' was changed to '408.0(10)'
- the average value was taken and precision was
estimated.

'_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        830.0(3)
_cod_database_code               2201209
_cod_database_fobs_code          2201209