Investigation of Three Stilbene Derivatives by X-ray Crystallography and NMR Spectroscopy
Stomberg, Rolf; Li, Shiming; Lundquist, Knut; Albinsson, Bo; Acta Crystallographica Section C 54 (1998) 1929–1934; doi:10.1107/S0108270198008877

data_2007999
_publ_section_title
;
 Investigation of Three Stilbene Derivatives by X-ray Crystallography
 and NMR Spectroscopy
;
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1929
_journal_page_last               1934
_journal_paper_doi               10.1107/S0108270198008877
_journal_volume                  54
_journal_year                    1998
_chemical_formula_moiety         'C19 H20 O5'
_chemical_formula_sum            'C19 H20 O5'
_chemical_formula_weight         328.35
_chemical_melting_point          389.5(5)
_chemical_name_systematic
;
(E)-2-Acetoxy-3,3',4'-trimethoxystilbene
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 117.0310(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.8655(2)
_cell_length_b                   12.0107(2)
_cell_length_c                   12.46080(10)
_cell_measurement_reflns_used    4713
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.13
_cell_measurement_theta_min      1.78
_cell_volume                     1715.15(4)
_computing_cell_refinement       'SAINT (Siemens, 1994a)'
_computing_data_collection       'SMART (Siemens, 1994b)'
_computing_data_reduction        'SAINT, XPREP (Siemens, 1996)'
_computing_molecular_graphics    'XP (Siemens, 1994c)'
_computing_publication_material  SHELXL93
_computing_structure_refinement  SHELXL93
_computing_structure_solution    'SHELXS86 (Sheldrick, 1985)'
_diffrn_ambient_temperature      293(2)
_diffrn_measurement_device       'Siemens SMART CCD'
_diffrn_measurement_method       '\w oscillation 0.30deg, 15 s frames'
_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  0.0359
_diffrn_reflns_av_sigmaI/netI    0.0287
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            11226
_diffrn_reflns_theta_max         25.13
_diffrn_reflns_theta_min         1.78
_diffrn_standards_decay_%        none
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.272
_exptl_crystal_density_meas      ?
_exptl_crystal_description       plate
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.191
_refine_diff_density_min         -0.133
_refine_ls_extinction_coef       0.019(2)
_refine_ls_extinction_method     SHELXL93
_refine_ls_goodness_of_fit_all   1.124
_refine_ls_goodness_of_fit_obs   1.111
_refine_ls_hydrogen_treatment    'H atoms riding'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     222
_refine_ls_number_reflns         2842
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.128
_refine_ls_restrained_S_obs      1.111
_refine_ls_R_factor_all          0.0736
_refine_ls_R_factor_obs          0.0443
_refine_ls_shift/esd_max         0.004
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0399P)^2^+0.5648P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1175
_refine_ls_wR_factor_obs         0.0956
_reflns_number_observed          2005
_reflns_number_total             2844
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            os1025.cif
_cod_data_source_block           2bmon
_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:

'_chemical_melting_point' value '389--390' was changed to '389.5(5)'
- 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 '389--390' was changed to '389.5(5)'
- the average value was taken and precision was
estimated.

'_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 

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^)+(0.0399P)^2^+0.5648P] 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^)+(0.0399P)^2^+0.5648P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2007999