η^6^-Tricarbonylchromium Complexes of Methyl 4,6-<i>O</i>-Benzylidene-α-<small>D</small>-glucopyranosides
Rickard, Clifton E. F.; Woodgate, Paul D.; Zhao, Zhongde; Acta Crystallographica Section C 54 (1998) 1420–1424; doi:10.1107/S0108270198005976

data_2007776
_publ_section_title
;
 \h^6^-Tricarbonylchromium Complexes of Methyl
 4,6-<i>O</i>-Benzylidene-\a-<small>D</small>-glucopyranosides
;
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1420
_journal_page_last               1424
_journal_paper_doi               10.1107/S0108270198005976
_journal_volume                  54
_journal_year                    1998
_chemical_formula_iupac          '[Cr (C17 H24 O7) (C O)3]'
_chemical_formula_moiety         'C20 H24 Cr O10'
_chemical_formula_sum            'C20 H24 Cr O10'
_chemical_formula_weight         476.39
_chemical_name_systematic
;
 Tricarbonyl[(R)-[methyl 2,3-di-O-methyl-4,6-O-[[1',2',3',4',5,'6'-\h]-4'-
 (methoxyphenyl)methylene]-\a-D-glucopyranoside]]chromium(0)
;
_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'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.4820(2)
_cell_length_b                   9.0429(3)
_cell_length_c                   28.6178(8)
_cell_measurement_reflns_used    6519
_cell_measurement_temperature    203(2)
_cell_measurement_theta_max      27
_cell_measurement_theta_min      2
_cell_volume                     2195.04(11)
_computing_cell_refinement       'SAINT (Siemens, 1994b)'
_computing_data_collection       'SMART (Siemens, 1994b)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Siemens, 1994a)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      203(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Siemens SMART'
_diffrn_measurement_method       Area-detector
_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  0.016
_diffrn_reflns_av_sigmaI/netI    0.0215
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       37
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            14172
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.36
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.574
_exptl_absorpt_correction_T_max  0.870
_exptl_absorpt_correction_T_min  0.736
_exptl_absorpt_correction_type   'empirical (Blessing, 1995)'
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.442
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             992
_exptl_crystal_size_max          0.57
_exptl_crystal_size_mid          0.36
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.275
_refine_diff_density_min         -0.388
_refine_ls_abs_structure_details 'Flack (1983)'
_refine_ls_abs_structure_Flack   -0.004(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    'H atoms: see below'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     284
_refine_ls_number_reflns         4882
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.028
_refine_ls_R_factor_obs          0.026
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0488P)^2^+0.1050P] where P = Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_obs         0.071
_refine_ls_wR_factor_ref         0.072
_reflns_number_gt                4676
_reflns_number_total             4882
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ta1212.cif
_cod_data_source_block           5
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 'Orthorhombic' changed to
'orthorhombic' 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:

'_refine_ls_weighting_scheme' value 'calc w =
1/[\s^2^(Fo^2^)+(0.0488P)^2^+0.1050P] 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^)+(0.0488P)^2^+0.1050P] where P = Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_formula_sum        'C20 H24 Cr1 O10'
_cod_database_code               2007776