Substituted Methoxybenzene Derivatives: C~8~H~9~NO~4~, C~9~H~11~NO~5~ and C~13~H~18~O~4~
Hoong-Kun Fun; Kandasamy Chinnakali; Kandasamy Sivakumar; Teng-Wah Sam; Siew-Eng How; Acta Crystallographica Section C 53 (1997) 1859–1862; doi:10.1107/S010827019700975X

data_2006854
_publ_section_title
;
 Substituted Methoxybenzene Derivatives: C~8~H~9~NO~4~, C~9~H~11~NO~5~
 and C~13~H~18~O~4~
;
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1859
_journal_page_last               1862
_journal_paper_doi               10.1107/S010827019700975X
_journal_volume                  53
_journal_year                    1997
_chemical_formula_sum            'C8 H9 N O4'
_chemical_formula_weight         183.16
_chemical_melting_point          97.5
_chemical_name_systematic
;
 1,2-dimethoxy-4-nitrobenzene.
;
_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                 102.070(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.3810(10)
_cell_length_b                   12.5560(10)
_cell_length_c                   6.8830(10)
_cell_measurement_reflns_used    38
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12.54
_cell_measurement_theta_min      5.27
_cell_volume                     877.32(17)
_diffrn_ambient_temperature      293(2)
_diffrn_measurement_device       'Siemens P4 diffractometer'
_diffrn_measurement_method       '\q/2\q scans'
_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  0.0315
_diffrn_reflns_av_sigmaI/netI    0.0415
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       1
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -1
_diffrn_reflns_number            2719
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.01
_diffrn_standards_decay_%        <3
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.113
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'Light Yellow'
_exptl_crystal_density_diffrn    1.387
_exptl_crystal_density_meas      ?
_exptl_crystal_description       Rectangular
_exptl_crystal_F_000             384
_exptl_crystal_size_max          0.66
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.28
_refine_diff_density_max         0.19
_refine_diff_density_min         -0.19
_refine_ls_extinction_coef       0.007(3)
_refine_ls_extinction_method     'SHELXL93 (Sheldrick, 1993)'
_refine_ls_goodness_of_fit_all   0.957
_refine_ls_goodness_of_fit_obs   1.123
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     155
_refine_ls_number_reflns         2014
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.957
_refine_ls_restrained_S_obs      1.123
_refine_ls_R_factor_all          0.0842
_refine_ls_R_factor_obs          .0454
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0725P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1404
_refine_ls_wR_factor_obs         .1219
_reflns_number_observed          1165
_reflns_number_total             2014
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            mu1333.cif
_cod_data_source_block           I
_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:

'_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.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' 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^)+(0.0725P)^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^)+(0.0725P)^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        877.3(2)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2006854