Redox routes to arenechromium complexes of two-, three- and four-electron alkynes; structure and bonding in paramagnetic [Cr(CO)L(η-RCCR)(η-arene)]+
Christopher J. Adams; Ian M. Bartlett; Neil G. Connelly; David J. Harding; Owen D. Hayward; Antonio J. Martín; A. Guy Orpen; Michael J. Quayle; Philip H. Rieger; J. Chem. Soc., Dalton Trans.  (2002) 4281–4288; doi:10.1039/b206177p

data_7011959
_publ_section_title
;
 Redox routes to arenechromium complexes of two-, three- and
 four-electron alkynes; structure and bonding in paramagnetic
 [Cr(CO)L(\h-RCCR)(\h-arene)]+
;
_journal_issue                   22
_journal_name_full               'J. Chem. Soc., Dalton Trans.'
_journal_page_first              4281
_journal_page_last               4288
_journal_paper_doi               10.1039/b206177p
_journal_year                    2002
_chemical_formula_sum            'C28 H28 Cl2 Cr F6 O2 P'
_chemical_formula_weight         664.37
_chemical_name_systematic
; 
? 
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_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                 100.83(16)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.1866(19)
_cell_length_b                   15.768(3)
_cell_length_c                   9.913(3)
_cell_measurement_temperature    173(2)
_cell_volume                     1410.4(10)
_computing_cell_refinement       'Siemens XSCANS'
_computing_data_collection       'Siemens XSCANS'
_computing_data_reduction        'Siemens SHELXTL'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens 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 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       '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  0.0543
_diffrn_reflns_av_sigmaI/netI    0.0545
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            6858
_diffrn_reflns_theta_full        25.11
_diffrn_reflns_theta_max         25.11
_diffrn_reflns_theta_min         2.09
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.717
_exptl_absorpt_correction_T_max  0.407
_exptl_absorpt_correction_T_min  0.300
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   XPREP
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.564
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       plate
_exptl_crystal_F_000             678
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.450
_refine_diff_density_min         -0.446
_refine_diff_density_rms         0.084
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.08(4)
_refine_ls_extinction_coef       0.0013(14)
_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   1.140
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     362
_refine_ls_number_reflns         3808
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.140
_refine_ls_R_factor_all          0.0727
_refine_ls_R_factor_gt           0.0553
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
calc w=1/[\s^2^(Fo^2^)+(0.0518P)^2^+2.8675P] where 
P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1243
_refine_ls_wR_factor_ref         0.1384
_reflns_number_gt                3243
_reflns_number_total             3808
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b206177p.txt
_cod_data_source_block           1plus
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 
;
_cod_original_cell_volume        1410.4(5)
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               7011959