C-C Bond Formation and Related Reactions at the CNC Backbone in (smif)FeX (smif = 1,3-Di-(2-pyridyl)-2-azaallyl): Dimerizations, 3 + 2 Cyclization, and Nucleophilic Attack; Transfer Hydrogenations and Alkyne Trimerization (X = N(TMS)2, dpma = (Di-(2-pyridyl-methyl)-amide))
Brenda A. Frazier; Valerie A. Williams; Peter T. Wolczanski; Suzanne C. Bart; Karsten Meyer; Thomas R. Cundari; Emil B. Lobkovsky; Inorganic Chemistry 52 (2013) 3295–3312; doi:10.1021/ic302783y

data_4334226
_publ_section_title
;
 C-C Bond Formation and Related Reactions at the CNC Backbone in (smif)FeX
 (smif = 1,3-Di-(2-pyridyl)-2-azaallyl): Dimerizations, 3 + 2 Cyclization,
 and Nucleophilic Attack; Transfer Hydrogenations and Alkyne Trimerization
 (X = N(TMS)2, dpma = (Di-(2-pyridyl-methyl)-amide))
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              3295
_journal_page_last               3312
_journal_paper_doi               10.1021/ic302783y
_journal_volume                  52
_journal_year                    2013
_chemical_formula_moiety         'C44 H72 Fe2 N8 Si4'
_chemical_formula_sum            'C44 H72 Fe2 N8 Si4'
_chemical_formula_weight         937.16
_chemical_name_systematic
; 
 ? 
;
_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   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                87.456(5)
_cell_angle_beta                 81.005(5)
_cell_angle_gamma                69.286(4)
_cell_formula_units_Z            1
_cell_length_a                   8.5974(6)
_cell_length_b                   12.1386(9)
_cell_length_c                   12.5960(9)
_cell_measurement_reflns_used    3531
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      23.36
_cell_measurement_theta_min      2.44
_cell_volume                     1214.34(16)
_computing_cell_refinement       'Bruker SAINT+'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT+'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker 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 0.980
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type  'Bruker X8 APEX II diffractometer'
_diffrn_measurement_method       'phi and 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  0.0609
_diffrn_reflns_av_sigmaI/netI    0.0565
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            20055
_diffrn_reflns_theta_full        24.71
_diffrn_reflns_theta_max         24.71
_diffrn_reflns_theta_min         1.79
_exptl_absorpt_coefficient_mu    0.735
_exptl_absorpt_correction_T_max  0.9819
_exptl_absorpt_correction_T_min  0.6667
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.282
_exptl_crystal_description       needle
_exptl_crystal_F_000             500
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.263
_refine_diff_density_min         -0.258
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     341
_refine_ls_number_reflns         4059
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.014
_refine_ls_R_factor_all          0.0586
_refine_ls_R_factor_gt           0.0384
_refine_ls_shift/su_max          0.284
_refine_ls_shift/su_mean         0.007
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0368P)^2^+0.3358P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0794
_refine_ls_wR_factor_ref         0.0858
_reflns_number_gt                3085
_reflns_number_total             4059
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic302783y_si_001_2.cif
_cod_data_source_block           bf16
_cod_original_cell_volume        1214.34(15)
_cod_database_code               4334226