Two ethyl 2-deoxy-α-<small>D</small>-hexo-3,7-pyranoso-3-octulosonate derivatives
Linden, Anthony; Li, Xianfeng; Lee, C. Kuan; Acta Crystallographica Section C 57 (2001) 1418–1420; doi:10.1107/S0108270101014974

data_2012379
_publ_section_title
;
 Two ethyl 2-deoxy-\a-<small>D</small>-hexo-3,7-pyranoso-3-octulosonate
 derivatives
;
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1418
_journal_page_last               1420
_journal_paper_doi               10.1107/S0108270101014974
_journal_volume                  57
_journal_year                    2001
_chemical_formula_iupac          'C38 H42 O8'
_chemical_formula_moiety         'C38 H42 O8'
_chemical_formula_sum            'C38 H42 O8'
_chemical_formula_weight         626.72
_chemical_melting_point          390.5(15)
_chemical_name_systematic
;
ethyl 2-deoxy-4,5,6,8-tetra-O-benzyl-\a-D-galacto-3,7-pyranoso-3-octulosonate
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.977(2)
_cell_length_b                   19.832(7)
_cell_length_c                   11.326(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    173.0(10)
_cell_measurement_theta_max      17.5
_cell_measurement_theta_min      11.0
_cell_volume                     3364.1(14)
_computing_cell_refinement       'MSC/AFC Diffractometer Control Software'
_computing_data_collection
;
MSC/AFC Diffractometer Control Software (Molecular
Structure Corporation, 1991)
;
_computing_data_reduction
'TEXSAN (Molecular Structure Corporation, 1999)'
_computing_molecular_graphics    'ORTEPII (Johnson, 1976)'
_computing_publication_material  'SHELXL97 and PLATON (Spek, 2001)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173.0(10)
_diffrn_measured_fraction_theta_full .997
_diffrn_measured_fraction_theta_max .997
_diffrn_measurement_device_type  'Rigaku AFC-5R'
_diffrn_measurement_method       \w/2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Rigaku rotating anode generator'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     .71069
_diffrn_reflns_av_R_equivalents  .020
_diffrn_reflns_av_sigmaI/netI    .052
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -1
_diffrn_reflns_number            4998
_diffrn_reflns_theta_full        27.5
_diffrn_reflns_theta_max         27.5
_diffrn_reflns_theta_min         2.7
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 150
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    .086
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.237
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1336
_exptl_crystal_size_max          .50
_exptl_crystal_size_mid          .33
_exptl_crystal_size_min          .30
_refine_diff_density_max         .21
_refine_diff_density_min         -.22
_refine_ls_extinction_coef       .0024(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 1997)'
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     421
_refine_ls_number_reflns         4302
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          .075
_refine_ls_R_factor_gt           .042
_refine_ls_shift/su_max          .001
_refine_ls_shift/su_mean         .000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0379P)^2^+0.5383P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          .093
_refine_ls_wR_factor_ref         .103
_reflns_number_gt                3230
_reflns_number_total             4302
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            gg1083.cif
_cod_data_source_block           II
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '389-392' was changed to '390.5(15)'
- 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 '389-392' was changed to '390.5(15)'
- the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        3364.0(14)
_cod_database_code               2012379
_cod_database_fobs_code          2012379