Stereoelectronic Factors in Iron Catalysis: Synthesis and Characterization of Aryl-Substituted Iron(II) Carbonyl P–N–N–P Complexes and Their Use in the Asymmetric Transfer Hydrogenation of Ketones
Sues, Peter E.; Lough, Alan J.; Morris, Robert H.; Organometallics 30 (2011) 4418–; doi:10.1021/om2005172

data_4063603
_publ_section_title
;
 Stereoelectronic Factors in Iron Catalysis: Synthesis and
 Characterization of Aryl-Substituted Iron(II) Carbonyl P--N--N--P
 Complexes and Their Use in the Asymmetric Transfer Hydrogenation of
 Ketones
;
_journal_issue                   16
_journal_name_full               Organometallics
_journal_page_first              4418
_journal_paper_doi               10.1021/om2005172
_journal_volume                  30
_journal_year                    2011
_chemical_formula_moiety         'C36 H44 O2 P2, 2(B F4)'
_chemical_formula_sum            'C36 H44 B2 F8 O2 P2'
_chemical_formula_weight         744.27
_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                97.466(3)
_cell_angle_beta                 111.386(3)
_cell_angle_gamma                96.296(3)
_cell_formula_units_Z            1
_cell_length_a                   8.6682(4)
_cell_length_b                   11.0451(7)
_cell_length_c                   11.7030(8)
_cell_measurement_reflns_used    8935
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.6
_cell_volume                     1019.39(11)
_computing_cell_refinement       'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'Collect (Nonius B.V., 1997-2002)'
_computing_data_reduction        Denzo-SMN
_computing_molecular_graphics    'PLATON (Spek, 2009)'
_computing_publication_material  'SHELXTL V6.1'
_computing_structure_refinement  'SHELXTL V6.1 (Sheldrick, 2008)'
_computing_structure_solution    'SIR-92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150(1)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\f scans and \w scans with \k offsets'
_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  0.058
_diffrn_reflns_av_sigmaI/netI    0.075
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            12641
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.56
_exptl_absorpt_coefficient_mu    0.172
_exptl_absorpt_correction_T_max  0.996
_exptl_absorpt_correction_T_min  0.901
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
multi-scan from symmetry-related measurements 
 Sortav (Blessing 1995) 
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.212
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             388
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.04
_platon_squeeze_details
; 
During the 
refinement of the structure, electron density peaks were located 
that were believed to be highly disordered 
solvent molecules (possibly methanol and/or diethylether). Attempts 
made to model the solvent molecule were not successful. 
The SQUEEZE option in PLATON (Spek, 2009) indicated there was a 
solvent cavity of volume 171 \%A^3^ containing approximately 29 
electrons. In the final cycles of refinement, this contribution to the 
electron density was removed from the observed data. The 
density, the F(000) value, the molecular weight and the formula are 
given without taking into account the results obtained with the 
SQUEEZE option PLATON (Spek, 2009). Similar treatments of disordered 
solvent molecules were carried out by St\"ahler et al. (2001), 
Cox et al. (2003), Mohamed et al. (2003) and Athimoolam et al. (2005). 
References: 
  
Spek, A. L. (2003). J. Appl. Cryst. 36, 7-13 
  
Athimoolam, S., Kumar, J., Ramakrishnan, V. & Rajaram, R.K. (2005). 
Acta Cryst. E61, m2014-m2017. 
  
Cox, J.P., Kumarasammy, Y., Nahar, L., Sarkar D.S. & Shoeb, M. 
(2003). Acta Cryst. E59, o975-o977. 
  
Mohamed, A.A., Krause Bauer, A.J., Bruce, E.A. & Bruce M.R.M. 
(2003). Acta Cryst. C59, m84-m86. 
  
St\"ahler, R., N\"ather, C. & Bensch, W. (2001). Acta Cryst. 
C57, 26-27. 
  
;
_refine_diff_density_max         1.284
_refine_diff_density_min         -0.397
_refine_diff_density_rms         0.078
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.111
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     230
_refine_ls_number_reflns         4627
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.112
_refine_ls_R_factor_all          0.1158
_refine_ls_R_factor_gt           0.0695
_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^)+(0.1147P)^2^+0.0054P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1905
_refine_ls_wR_factor_ref         0.2119
_reflns_number_gt                2986
_reflns_number_total             4627
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            om2005172_si_002.cif
_cod_data_source_block           6c
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to the built-in table from CIF Core 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 
;
_cod_database_code               4063603