Diethyl 4,7-dimethoxyindan-2,2-dicarboxylate
Peter Hammershøj; Jørn B. Christensen; Acta Crystallographica Section E 61 (2005) o3468–o3469; doi:10.1107/S1600536805030217

data_2206907
_publ_section_title
;
 Diethyl 4,7-dimethoxyindan-2,2-dicarboxylate
;
_journal_coeditor_code           CI6634
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3468
_journal_page_last               o3469
_journal_paper_doi               10.1107/S1600536805030217
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C17 H22 O6'
_chemical_formula_moiety         'C17 H22 O6'
_chemical_formula_sum            'C17 H22 O6'
_chemical_formula_weight         322.35
_chemical_melting_point          90.0(10)
_chemical_name_common
;
4,7-Dimethoxy-indan-2,2-dicarboxylic acid diethyl ester
;
_chemical_name_systematic
;
4,7-Dimethoxy-indan-2,2-dicarboxylic acid diethyl ester
;
_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'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.000
_cell_angle_beta                 90.232(7)
_cell_angle_gamma                90.000
_cell_formula_units_Z            8
_cell_length_a                   16.5690(10)
_cell_length_b                   8.0330(10)
_cell_length_c                   24.643(3)
_cell_measurement_reflns_used    37980
_cell_measurement_temperature    122(2)
_cell_measurement_theta_max      39.97
_cell_measurement_theta_min      1.23
_cell_volume                     3279.9(6)
_computing_cell_refinement       'DIRAX (Duisenberg, 1992)'
_computing_data_collection       'COLLECT (Nonius, 1999)'
_computing_data_reduction        'EVALCCD (Duisenberg et al., 2003)'
_computing_molecular_graphics    'ORTEPIII (Burnett & Johnson, 1996)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      122(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Nonius KappaCCD area-detector'
_diffrn_measurement_method       '\w and \f 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  0.0793
_diffrn_reflns_av_sigmaI/netI    0.0564
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -29
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       44
_diffrn_reflns_limit_l_min       -43
_diffrn_reflns_number            141916
_diffrn_reflns_theta_full        39.97
_diffrn_reflns_theta_max         39.97
_diffrn_reflns_theta_min         1.23
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_T_max  0.988
_exptl_absorpt_correction_T_min  0.977
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details
;
Gaussian integration (Coppens, 1970)
;
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.306
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             1376
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.650
_refine_diff_density_min         -0.321
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.077
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         20169
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.077
_refine_ls_R_factor_all          0.1238
_refine_ls_R_factor_gt           0.0611
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         <0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0458P)^2^+1.6487P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1190
_refine_ls_wR_factor_ref         0.1487
_reflns_number_gt                12472
_reflns_number_total             20169
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ci6634.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.

'_exptl_absorpt_correction_type' value 'Integration' changed
to 'integration' 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 '89-91' was changed to '90.0(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 '89-91' was changed to '90.0(10)' -
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.

'_exptl_absorpt_correction_type' value 'Integration'
changed to 'integration' 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_sg_symbol_H-M      'P 21/c'
_cod_database_code               2206907
_cod_database_fobs_code          2206907