Synthesis of New Selenium- and Oxygen-Containing Tungsten Acetylide Complexes [(η5-C5Me5)W(O)(Se2)(CCPh)] and [(η5-C5Me5)W(Se5CCPh)]
Mathur, Pradeep; Ahmed, Moawia O.; Dash, Aswini K.; Kaldis, John H.; Organometallics 19 (2000) 941–; doi:10.1021/om990775k

data_4077677
_publ_section_title
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 Synthesis of New Selenium- and Oxygen-Containing Tungsten Acetylide
 Complexes [(\h5-C5Me5)W(O)(Se2)(CCPh)] and [(\h5-C5Me5)W(Se5CCPh)]
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_journal_issue                   5
_journal_name_full               Organometallics
_journal_page_first              941
_journal_paper_doi               10.1021/om990775k
_journal_volume                  19
_journal_year                    2000
_chemical_formula_sum            'C18 H20 Se5 W'
_chemical_formula_weight         814.99
_chemical_name_systematic
; 
 ? 
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_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
_cell_angle_alpha                100.669(6)
_cell_angle_beta                 93.552(5)
_cell_angle_gamma                99.281(8)
_cell_formula_units_Z            2
_cell_length_a                   7.191(2)
_cell_length_b                   8.353(2)
_cell_length_c                   17.930(5)
_cell_measurement_reflns_used    2707
_cell_measurement_temperature    299(2)
_cell_measurement_theta_max      22.50
_cell_measurement_theta_min      2.32
_cell_volume                     1039.8(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-V.5.03 (Sheldrick, 1994)'
_computing_structure_solution    'SHELXTL-V.5.03 (Sheldrick, 1994)'
_diffrn_ambient_temperature      299(2)
_diffrn_measurement_device       'Siemems Smart CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0236
_diffrn_reflns_av_sigmaI/netI    0.0566
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            6370
_diffrn_reflns_theta_max         22.50
_diffrn_reflns_theta_min         2.32
_exptl_absorpt_coefficient_mu    14.304
_exptl_absorpt_correction_T_max  0.372043
_exptl_absorpt_correction_T_min  0.305697
_exptl_absorpt_correction_type   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            'dark red'
_exptl_crystal_density_diffrn    2.603
_exptl_crystal_description       plate
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.11
_refine_diff_density_max         1.028
_refine_diff_density_min         -1.070
_refine_diff_density_rms         0.153
_refine_ls_extinction_coef       0.0018(2)
_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_all   0.891
_refine_ls_goodness_of_fit_obs   0.952
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         2704
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.896
_refine_ls_restrained_S_obs      0.952
_refine_ls_R_factor_all          0.0512
_refine_ls_R_factor_obs          0.0317
_refine_ls_shift/esd_max         0.049
_refine_ls_shift/esd_mean        0.008
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0426P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0724
_refine_ls_wR_factor_obs         0.0661
_reflns_number_observed          2055
_reflns_number_total             2707
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            om990775k.cif
_cod_data_source_block           compound_2
_cod_depositor_comments
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The following automatic conversions were performed:

'_refine_ls_hydrogen_treatment' value 'no ref' changed to 'noref'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

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^)+(0.0426P)^2^+0.0000P] 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^)+(0.0426P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4077677