Molybdenum and Tungsten Structural Differences are Dependent on ndz2/(n+1)s Mixing: Comparisons of (silox)3MX/R (M = Mo, W; silox =tBu3SiO)
David S. Kuiper; Richard E. Douthwaite; Ana-Rita Mayol; Peter T. Wolczanski; Emil B. Lobkovsky; Thomas R. Cundari; Oanh P. Lam; Karsten Meyer; Inorganic Chemistry 47 (2008) 7139–7153; doi:10.1021/ic800139c

data_4305267
_publ_section_title
;
Molybdenum and Tungsten Structural Differences are Dependent on ndz2/(n+1)s
Mixing: Comparisons of (silox)3MX/R (M = Mo, W; silox =tBu3SiO)
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_journal_name_full               'Inorganic Chemistry'
_journal_page_first              7139
_journal_page_last               7153
_journal_paper_doi               10.1021/ic800139c
_journal_volume                  47
_journal_year                    2008
_chemical_formula_moiety         'C38 H86 Mo O3 Si3'
_chemical_formula_sum            'C41 H89 Mo O3 Si3'
_chemical_formula_weight         807.31
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                85.315(4)
_cell_angle_beta                 89.510(4)
_cell_angle_gamma                77.487(4)
_cell_formula_units_Z            2
_cell_length_a                   8.8484(8)
_cell_length_b                   12.4732(12)
_cell_length_c                   22.267(2)
_cell_measurement_reflns_used    7814
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      0.00
_cell_measurement_theta_min      0.00
_cell_volume                     2391.1(4)
_computing_cell_refinement       'Bruker SAINT+'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT+'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.976
_diffrn_measured_fraction_theta_max 0.976
_diffrn_measurement_device_type  'Bruker X8 APEX II diffractometer'
_diffrn_measurement_method       'phi and omega 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  0.0341
_diffrn_reflns_av_sigmaI/netI    0.0313
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            48709
_diffrn_reflns_theta_full        25.87
_diffrn_reflns_theta_max         25.87
_diffrn_reflns_theta_min         1.68
_exptl_absorpt_coefficient_mu    0.381
_exptl_absorpt_correction_T_max  0.9629
_exptl_absorpt_correction_T_min  0.8943
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.121
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             880
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.620
_refine_diff_density_min         -0.988
_refine_diff_density_rms         0.101
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.017
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     581
_refine_ls_number_reflns         9043
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.017
_refine_ls_R_factor_all          0.0703
_refine_ls_R_factor_gt           0.0626
_refine_ls_shift/su_max          0.827
_refine_ls_shift/su_mean         0.071
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0849P)^2^+9.0484P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1609
_refine_ls_wR_factor_ref         0.1667
_reflns_number_gt                8064
_reflns_number_total             9043
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic800139c-file001_4.cif
_cod_data_source_block           dk9
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 
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_cod_database_code               4305267