<i>cis</i>- and <i>trans</i>-1,3-Diethoxy-1,3-diphosphorinane-1,3-dione
Jones, Peter G.; Fischer, Axel K.; Acta Crystallographica Section C 54 (1998) 1451–1453; doi:10.1107/S0108270198006349

data_2007702
_publ_section_title
;
 <i>cis</i>- and
 <i>trans</i>-1,3-Diethoxy-1,3-diphosphorinane-1,3-dione
;
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1451
_journal_page_last               1453
_journal_paper_doi               10.1107/S0108270198006349
_journal_volume                  54
_journal_year                    1998
_chemical_formula_sum            'C8 H18 O4 P2'
_chemical_formula_weight         240.16
_chemical_name_systematic
;
 trans-1,3-Diethoxy-1,3-diphosphorinane-1,3-dione
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
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_cell_length_b                   18.715(5)
_cell_length_c                   17.183(6)
_cell_measurement_reflns_used    50
_cell_measurement_temperature    178(2)
_cell_measurement_theta_max      11.5
_cell_measurement_theta_min      10.0
_cell_volume                     2359.8(12)
_computing_cell_refinement       'P3 Software'
_computing_data_collection
'P3 Software (Nicolet Instrument Corporation, 1987)'
_computing_data_reduction        'XDISK in P3 Software'
_computing_molecular_graphics    'XP (Siemens, 1994)'
_computing_publication_material  SHELXL93
_computing_structure_refinement  'SHELXL93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      178(2)
_diffrn_measurement_device       'Nicolet R3'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
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_diffrn_reflns_theta_min         3.05
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 147
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.357
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.352
_exptl_crystal_density_meas      ?
_exptl_crystal_description       prism
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_exptl_crystal_size_mid          0.5
_exptl_crystal_size_min          0.5
_refine_diff_density_max         0.30
_refine_diff_density_min         -0.35
_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^)+(0.0432P)^2^+1.381P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.105
_refine_ls_wR_factor_obs         0.090
_reflns_number_observed          4144
_reflns_number_total             5451
_reflns_observed_criterion       I>2sigma(I)
_cod_data_source_file            bm1249.cif
_cod_data_source_block           2
_cod_depositor_comments
;
The following automatic conversions were performed:
'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (12 times).

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

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^)+(0.0432P)^2^+1.381P] 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^)+(0.0432P)^2^+1.381P] 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/n'
_cod_database_code               2007702