Synthesis, molecular structures, fluxional properties and catalytic activity of a series of alkyne complexes of molybdenum(II) and tungsten(II) containing phosphite donor ligands
Baker, Paul K.; Drew, Michael G. B.; Evans, Deborah S.; Johans, Archie W.; Meehan, Margaret M.; Journal of the Chemical Society, Dalton Transactions  (1999) 2541–; doi:10.1039/a902224d

data_7027403
_publ_section_title
;
 Synthesis, molecular structures, fluxional properties and catalytic
 activity of a series of alkyne complexes of molybdenum(II) and
 tungsten(II) containing phosphite donor ligands
;
_journal_issue                   15
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              2541
_journal_paper_doi               10.1039/a902224d
_journal_year                    1999
_chemical_formula_moiety         W(CO)(MeCCMe)I2(P(OPr)3)2
_chemical_formula_sum            'C23 H48 I2 O7 P2 W'
_chemical_formula_weight         936.20
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           18
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2 2ab'
_symmetry_space_group_name_H-M   'P 21 21 2'
_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            2
_cell_length_a                   14.079(15)
_cell_length_b                   14.072(15)
_cell_length_c                   9.146(9)
_cell_measurement_reflns_used    all
_cell_measurement_temperature    293(2)
_cell_volume                     1812(3)
_computing_cell_refinement       XDS
_computing_data_collection       'XDS (Kabsch, 1991)'
_computing_data_reduction        XDS
_computing_molecular_graphics    PLATON(Spek,1994)
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measurement_device       'Marresearch Image Plate'
_diffrn_measurement_method
'95 frames at 2^o intervals, counting time 2 min.'
_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  0.0399
_diffrn_reflns_av_sigmaI/netI    0.0347
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            5550
_diffrn_reflns_theta_max         25.88
_diffrn_reflns_theta_min         2.89
_diffrn_standards_number         n/a
_exptl_absorpt_coefficient_mu    5.011
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.352
_exptl_absorpt_correction_type   'DIFABS(Stuart and Walker, 1983)'
_exptl_crystal_density_diffrn    1.716
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             904
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.107
_refine_diff_density_min         -1.202
_refine_diff_density_rms         0.125
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.03(7)
_refine_ls_extinction_coef       0.0096(10)
_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   0.710
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     166
_refine_ls_number_reflns         3335
_refine_ls_number_restraints     102
_refine_ls_restrained_S_all      0.711
_refine_ls_R_factor_all          0.0456
_refine_ls_R_factor_gt           0.0427
_refine_ls_shift/su_max          0.081
_refine_ls_shift/su_mean         0.012
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1217P)^2^+8.4740P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1206
_refine_ls_wR_factor_ref         0.1258
_reflns_number_gt                3133
_reflns_number_total             3335
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            902224dsup1.cif
_cod_data_source_block           15
_cod_depositor_comments
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The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.1217P)^2^+8.4740P] 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^)+(0.1217P)^2^+8.4740P] 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      P21212
_cod_database_code               7027403