Two Schiff Base Ligands Derived from 1,2-Diaminoethane
Corden, J. P.; Errington, W.; Moore, P.; Wallbridge, M. G. H.; Acta Crystallographica Section C 53 (1997) 486–488; doi:10.1107/S0108270196014473

data_2006086
_publ_section_title
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 Two Schiff Base Ligands Derived from 1,2-Diaminoethane
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              486
_journal_page_last               488
_journal_paper_doi               10.1107/S0108270196014473
_journal_volume                  53
_journal_year                    1997
_chemical_formula_sum            'C28 H24 N2 O2'
_chemical_formula_weight         420.49
_chemical_name_systematic
;
  2,2'-[(1,2-ethanediyl)bis(nitrilobenzylidyne)]bisphenol
;
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   18.530(8)
_cell_length_b                   13.443(10)
_cell_length_c                   17.737(8)
_cell_measurement_reflns_used    250
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.15
_cell_measurement_theta_min      1.87
_cell_volume                     4418(4)
_computing_cell_refinement       MADNES
_computing_data_collection       'MADNES (Pflugrath & Messerschmidt, 1992)'
_computing_data_reduction        'SHELXTL-Plus (Sheldrick, 1991)'
_computing_molecular_graphics    SHELXTL-Plus
_computing_publication_material  SHELXL93
_computing_structure_refinement  'SHELXL93 (Sheldrick, 1993)'
_computing_structure_solution    SHELXTL-Plus
_diffrn_ambient_temperature      150(2)
_diffrn_measurement_device
;
Delft Instruments FAST TV area detector diffractometer
;
_diffrn_measurement_method       flat-plate
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         rotating-anode
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0918
_diffrn_reflns_av_sigmaI/netI    0.2203
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
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_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -13
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_diffrn_reflns_theta_max         25.15
_diffrn_reflns_theta_min         1.87
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.264
_exptl_crystal_density_meas      ?
_exptl_crystal_description       needle
_exptl_crystal_F_000             1776
_exptl_crystal_size_max          0.52
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.148
_refine_diff_density_min         -0.165
_refine_ls_abs_structure_details 'Flack (1983)'
_refine_ls_abs_structure_Flack   -7.(2)
_refine_ls_extinction_method     none
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_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0172P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0854
_refine_ls_wR_factor_obs         0.0674
_reflns_number_observed          2491
_reflns_number_total             6357
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            pa1247.cif
_cod_data_source_block           II
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc w =
1/[\s^2^(Fo^2^)+(0.0172P)^2^] where P=(Fo^2^+2Fc^2^)/3' was changed
to 'calc'. New tag '_refine_ls_weighting_details' was created. The
value of the new tag was set to 'w = 1/[\s^2^(Fo^2^)+(0.0172P)^2^]
where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        4418.(4)
_cod_database_code               2006086