Base-Free Iron Hydrosilylene Complexes via an α-Hydride Migration that Induces Spin Pairing.
Smith, Patrick W.; Tilley, T. Don; Journal of the American Chemical Society 140 (2018) 3880–3883; doi:10.1021/jacs.8b01185

data_4132067
_publ_section_title
;
 Base-Free Iron Hydrosilylene Complexes via an \a-Hydride Migration that
 Induces Spin Pairing.
;
_journal_issue                   11
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              3880
_journal_page_last               3883
_journal_paper_doi               10.1021/jacs.8b01185
_journal_volume                  140
_journal_year                    2018
_chemical_formula_moiety         '2(C20.5 H30 Fe0.5 P0.5 Si0.5)'
_chemical_formula_sum            'C41.01 H60.01 Fe P Si'
_chemical_formula_weight         667.87
_space_group_crystal_system      orthorhombic
_space_group_IT_number           62
_space_group_name_Hall           '-P 2ac 2n'
_space_group_name_H-M_alt        'P n m a'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_audit_creation_date             2017-12-13
_audit_creation_method
;
Olex2 1.2
(compiled 2017.08.10 svn.r3458 for OlexSys, GUI svn.r5381)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   27.887(3)
_cell_length_b                   11.5982(13)
_cell_length_c                   11.5654(10)
_cell_measurement_reflns_used    6057
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.24
_cell_measurement_theta_min      2.28
_cell_volume                     3740.7(7)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      99.99
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0773
_diffrn_reflns_av_unetI/netI     0.0715
_diffrn_reflns_Laue_measured_fraction_full 0.995
_diffrn_reflns_Laue_measured_fraction_max 0.990
_diffrn_reflns_limit_h_max       33
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            21681
_diffrn_reflns_point_group_measured_fraction_full 0.995
_diffrn_reflns_point_group_measured_fraction_max 0.990
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.356
_diffrn_reflns_theta_min         1.460
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.505
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            blue
_exptl_crystal_colour_primary    blue
_exptl_crystal_density_diffrn    1.186
_exptl_crystal_description       block
_exptl_crystal_F_000             1444
_refine_diff_density_max         0.224
_refine_diff_density_min         -0.295
_refine_diff_density_rms         0.051
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.130
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     490
_refine_ls_number_reflns         3567
_refine_ls_number_restraints     66
_refine_ls_restrained_S_all      1.127
_refine_ls_R_factor_all          0.1106
_refine_ls_R_factor_gt           0.0657
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0043P)^2^+5.4084P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0973
_refine_ls_wR_factor_ref         0.1075
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2406
_reflns_number_total             3567
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja8b01185_si_006.cif
_cod_data_source_block           ps4_103_0ma
_cod_database_code               4132067
_shelx_shelxl_version_number     2017/1
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Uiso/Uaniso restraints and constraints
Uanis(C25) \\sim Ueq, Uanis(C17) \\sim Ueq, Uanis(C15) \\sim Ueq, Uanis(C46)
\\sim Ueq, Uanis(C45) \\sim Ueq, Uanis(C44) \\sim Ueq, Uanis(C43) \\sim Ueq,
Uanis(C1) \\sim Ueq, Uanis(C5) \\sim Ueq, Uanis(C4) \\sim Ueq, Uanis(C3) \\sim
Ueq: with sigma of 0.005 and sigma for terminal atoms of 0.005
3. Others
 Sof(C42)=Sof(H42A)=Sof(H42B)=Sof(H42C)=Sof(C43)=Sof(H43)=Sof(C44)=Sof(H44A)=
 Sof(H44B)=Sof(H44C)=Sof(C45)=Sof(H45A)=Sof(H45B)=Sof(H45C)=Sof(C46)=Sof(H46)=
 Sof(C47)=Sof(H47A)=Sof(H47B)=Sof(H47C)=Sof(C48)=Sof(H48A)=Sof(H48B)=Sof(H48C)=
 0.5*(1-FVAR(2))
 Sof(C11)=Sof(H11A)=Sof(H11B)=Sof(H11C)=Sof(C12)=Sof(H12)=Sof(C13)=Sof(H13A)=
 Sof(H13B)=Sof(H13C)=Sof(C14)=Sof(H14A)=Sof(H14B)=Sof(H14C)=Sof(C15)=Sof(H15)=
 Sof(C16)=Sof(H16A)=Sof(H16B)=Sof(H16C)=Sof(C17)=Sof(H17A)=Sof(H17B)=Sof(H17C)=
 0.5*FVAR(2)
 Fixed Sof: P1(0.5) Fe1(0.5) Si1(0.5) H1B(0.5) C1(0.5) C2(0.5) C3(0.5) C4(0.5)
 C5(0.5) C6(0.5) H6A(0.5) H6B(0.5) H6C(0.5) C7(0.5) H7A(0.5) H7B(0.5) H7C(0.5)
 C8(0.5) H8A(0.5) H8B(0.5) H8C(0.5) C9(0.5) H9A(0.5) H9B(0.5) H9C(0.5) C10(0.5)
 H10A(0.5) H10B(0.5) H10C(0.5) C18(0.5) C19(0.5) C20(0.5) H20(0.5) C21(0.5)
 H21(0.5) C22(0.5) H22(0.5) C23(0.5) C24(0.5) C25(0.5) C26(0.5) H26(0.5)
 C27(0.5) C28(0.5) H28(0.5) C29(0.5) C30(0.5) H30A(0.5) H30B(0.5) H30C(0.5)
 C31(0.5) H31A(0.5) H31B(0.5) H31C(0.5) C32(0.5) H32A(0.5) H32B(0.5) H32C(0.5)
 C33(0.5) C34(0.5) C35(0.5) H35(0.5) C36(0.5) C37(0.5) H37(0.5) C38(0.5)
 C39(0.5) H39A(0.5) H39B(0.5) H39C(0.5) C40(0.5) H40A(0.5) H40B(0.5) H40C(0.5)
 C41(0.5) H41A(0.5) H41B(0.5) H41C(0.5)
4.a Ternary CH refined with riding coordinates:
 C43(H43), C46(H46), C12(H12), C15(H15)
4.b Aromatic/amide H refined with riding coordinates:
 C20(H20), C21(H21), C22(H22), C26(H26), C28(H28), C35(H35), C37(H37)
4.c Idealised Me refined as rotating group:
 C42(H42A,H42B,H42C), C44(H44A,H44B,H44C), C45(H45A,H45B,H45C), C47(H47A,H47B,
 H47C), C48(H48A,H48B,H48C), C6(H6A,H6B,H6C), C7(H7A,H7B,H7C), C8(H8A,H8B,H8C),
 C9(H9A,H9B,H9C), C10(H10A,H10B,H10C), C11(H11A,H11B,H11C), C13(H13A,H13B,H13C),
  C14(H14A,H14B,H14C), C16(H16A,H16B,H16C), C17(H17A,H17B,H17C), C30(H30A,H30B,
 H30C), C31(H31A,H31B,H31C), C32(H32A,H32B,H32C), C39(H39A,H39B,H39C), C40(H40A,
 H40B,H40C), C41(H41A,H41B,H41C)
;
_shelx_res_checksum              9492
_shelx_hkl_checksum              66403
_olex2_submission_special_instructions 'No special instructions were received'