Reactions of Doubly SiMe2-Bridged Bis(cyclopentadienyl) Complexes of Molybdenum and Iron Carbonyls: Competitive Ring-to-Metal Migrations of Hydrogen and SiMe2
Zhu, Bolin; Chen, Yunfei; Shi, Wei; Li, Yuan; Hao, Xiaoting; Organometallics 31 (2012) 4046–; doi:10.1021/om300305g

data_4078317
_publ_section_title
;
 Reactions of Doubly SiMe2-Bridged Bis(cyclopentadienyl) Complexes of
 Molybdenum and Iron Carbonyls: Competitive Ring-to-Metal Migrations of
 Hydrogen and SiMe2
;
_journal_issue                   10
_journal_name_full               Organometallics
_journal_page_first              4046
_journal_paper_doi               10.1021/om300305g
_journal_volume                  31
_journal_year                    2012
_chemical_formula_sum            'C72 H72 Fe8 O16 Si8'
_chemical_formula_weight         1864.82
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   geom
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_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            1
_cell_length_a                   16.478(9)
_cell_length_b                   9.777(6)
_cell_length_c                   12.313(7)
_cell_measurement_reflns_used    2740
_cell_measurement_temperature    296(2)
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_cell_measurement_theta_min      2.42
_cell_volume                     1984(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_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
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_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       14
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_diffrn_reflns_number            9682
_diffrn_reflns_theta_full        25.01
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_diffrn_reflns_theta_min         2.42
_exptl_absorpt_coefficient_mu    1.603
_exptl_absorpt_correction_T_max  0.8187
_exptl_absorpt_correction_T_min  0.7950
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.561
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             952
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_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
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_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0253P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0577
_refine_ls_wR_factor_ref         0.0612
_reflns_number_gt                2498
_reflns_number_total             2975
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om300305g_si_003.cif
_cod_data_source_block           120302b
_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_values 1715 2011-07-08 13:25:40Z adriana 

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      Pna21
_cod_database_code               4078317