Step-by-step covalent modification of Cr-templated Anderson-type polyoxometalates.
Lin, Chang-Gen; Chen, Wei; Long, De-Liang; Cronin, Leroy; Song, Yu-Fei; Dalton transactions (Cambridge, England : 2003) 43 (2014) 8587–8590; doi:10.1039/c4dt00033a

data_7031004
_publ_section_title
;
 Step-by-step covalent modification of Cr-templated Anderson-type
 polyoxometalates.
;
_journal_issue                   23
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              8587
_journal_page_last               8590
_journal_paper_doi               10.1039/c4dt00033a
_journal_volume                  43
_journal_year                    2014
_chemical_formula_sum            'C53 H142 Cr Mo6 N3 O35'
_chemical_formula_weight         2009.34
_chemical_name_systematic
;
 ?
;
_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           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                   15.164(3)
_cell_length_b                   21.818(4)
_cell_length_c                   25.095(5)
_cell_measurement_reflns_used    32886
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      31.0
_cell_measurement_theta_min      2.11
_cell_volume                     8303(3)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  Rigaku
_diffrn_measurement_method       '\w & \p 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  0.0480
_diffrn_reflns_av_sigmaI/netI    0.0504
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            48873
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.30
_diffrn_standards_decay_%        none
_exptl_absorpt_coefficient_mu    1.083
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.746
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   DTABSCOR
_exptl_crystal_colour            violet
_exptl_crystal_density_diffrn    1.607
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chunk
_exptl_crystal_F_000             4148
_exptl_crystal_size_max          0.56
_exptl_crystal_size_mid          0.52
_exptl_crystal_size_min          0.27
_refine_diff_density_max         1.02
_refine_diff_density_min         -0.62
_refine_diff_density_rms         0.09
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.01(3)
_refine_ls_extinction_coef       0.00067(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.083
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     890
_refine_ls_number_reflns         16248
_refine_ls_number_restraints     5
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0415
_refine_ls_R_factor_gt           0.0403
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0377P)^2^+8.5657P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0970
_refine_ls_wR_factor_ref         0.0979
_reflns_number_gt                15883
_reflns_number_total             16248
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c4dt00033a2.cif
_cod_data_source_block           2
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' 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 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7031004