2,2-Di-<i>C</i>-methoxy-1,4:3,6-dianhydromannitol
Quan-Jian Lv; Xue-Hui Hou; Acta Crystallographica Section E 63 (2007) o3653–o3653; doi:10.1107/S1600536807033387

data_2214647
_publ_section_title
;
 2,2-Di-<i>C</i>-methoxy-1,4:3,6-dianhydromannitol
;
_journal_coeditor_code           FL2143
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3653
_journal_page_last               o3653
_journal_paper_doi               10.1107/S1600536807033387
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          'C8 H14 O5'
_chemical_formula_moiety         'C8 H14 O5'
_chemical_formula_sum            'C8 H14 O5'
_chemical_formula_weight         190.19
_chemical_name_systematic
;
2,2-Di-C-methoxy-1,4:3,6-dianhydromannitol
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 93.07(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.4996(13)
_cell_length_b                   6.3375(13)
_cell_length_c                   10.983(2)
_cell_measurement_reflns_used    389
_cell_measurement_temperature    291(2)
_cell_measurement_theta_max      25.1
_cell_measurement_theta_min      2
_cell_volume                     451.75(15)
_computing_cell_refinement       R-AXIS
_computing_data_collection
'R-AXIS (Molecular Structure Corporation, 1993)'
_computing_data_reduction        R-AXIS
_computing_molecular_graphics
'TEXSAN (Molecular Structure Corporation, 1993)'
_computing_publication_material  TEXSAN
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      291(2)
_diffrn_detector_area_resol_mean 0
_diffrn_measured_fraction_theta_full 0.954
_diffrn_measured_fraction_theta_max 0.954
_diffrn_measurement_device_type  'Rigaku R-AXIS-IV'
_diffrn_measurement_method       'Oscillation 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  0.0446
_diffrn_reflns_av_sigmaI/netI    0.0375
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            1418
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.86
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.117
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.398
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             204
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.202
_refine_diff_density_min         -0.226
_refine_ls_extinction_coef       0.32(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     123
_refine_ls_number_reflns         829
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0536
_refine_ls_R_factor_gt           0.0506
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0956P)^2^+0.0821P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1345
_refine_ls_wR_factor_ref         0.1376
_reflns_number_gt                772
_reflns_number_total             829
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fl2143.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_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_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_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 
;
_cod_original_cell_volume        451.77(16)
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               2214647
_cod_database_fobs_code          2214647