Bimetallic Mechanism for Alkyne Cyclotrimerization with a Two-Coordinate Fe Precatalyst
Witzke, Ryan J.; Hait, Diptarka; Chakarawet, Khetpakorn; Head-Gordon, Martin; Tilley, T. Don; ACS Catalysis  (2020) 7800–; doi:10.1021/acscatal.0c01828

data_4517831
_publ_section_title
;
 Bimetallic Mechanism for Alkyne Cyclotrimerization with a Two-Coordinate
 Fe Precatalyst
;
_journal_name_full               'ACS Catalysis'
_journal_page_first              7800
_journal_paper_doi               10.1021/acscatal.0c01828
_journal_year                    2020
_chemical_formula_moiety         'C58 H72 Fe2 N2 Si2, C4 H10 O'
_chemical_formula_sum            'C62 H82 Fe2 N2 O Si2'
_chemical_formula_weight         1039.17
_chemical_name_common            RJW_2_139
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_creation_date             2020-04-16
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                89.7750(10)
_cell_angle_beta                 87.9100(10)
_cell_angle_gamma                85.7410(10)
_cell_formula_units_Z            2
_cell_length_a                   12.1310(7)
_cell_length_b                   12.8600(7)
_cell_length_c                   18.9741(11)
_cell_measurement_reflns_used    9381
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.34
_cell_measurement_theta_min      2.40
_cell_volume                     2949.9(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_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      99.95
_diffrn_detector_area_resol_mean 8.366
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-I CCD'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0232
_diffrn_reflns_av_unetI/netI     0.0144
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            75561
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         25.348
_diffrn_reflns_theta_min         1.588
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.572
_exptl_absorpt_correction_T_max  0.7896
_exptl_absorpt_correction_T_min  0.7237
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2014/5 (Bruker,2014/5) was used for absorption correction. wR2(int) was 0.0487 before and 0.0331 after correction. The Ratio of minimum to maximum transmission is 0.9165. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.170
_exptl_crystal_description       block
_exptl_crystal_F_000             1112
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.836
_refine_diff_density_min         -0.312
_refine_diff_density_rms         0.056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.075
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     638
_refine_ls_number_reflns         10819
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.075
_refine_ls_R_factor_all          0.0416
_refine_ls_R_factor_gt           0.0378
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0605P)^2^+1.2912P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0987
_refine_ls_wR_factor_ref         0.1019
_reflns_Friedel_coverage         0.000
_reflns_number_gt                9770
_reflns_number_total             10819
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            cs0c01828_si_004.cif
_cod_data_source_block           rjw_2_139_0m
_cod_database_code               4517831
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_max   0.945
_shelx_estimated_absorpt_t_min   0.866
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C35(H35), C38(H38), C50(H50), C53(H53)
2.b Secondary CH2 refined with riding coordinates:
 C60(H60A,H60B), C61(H61A,H61B)
2.c Aromatic/amide H refined with riding coordinates:
 C6(H6), C7(H7), C8(H8), C9(H9), C10(H10), C12(H12), C13(H13), C14(H14),
 C15(H15), C16(H16), C18(H18), C19(H19), C20(H20), C21(H21), C22(H22), C24(H24),
  C25(H25), C26(H26), C27(H27), C28(H28), C31(H31), C32(H32), C33(H33),
 C46(H46), C47(H47), C48(H48)
2.d Idealised Me refined as rotating group:
 C36(H36A,H36B,H36C), C37(H37A,H37B,H37C), C39(H39A,H39B,H39C), C40(H40A,H40B,
 H40C), C41(H41A,H41B,H41C), C42(H42A,H42B,H42C), C43(H43A,H43B,H43C), C51(H51A,
 H51B,H51C), C52(H52A,H52B,H52C), C54(H54A,H54B,H54C), C55(H55A,H55B,H55C),
 C56(H56A,H56B,H56C), C57(H57A,H57B,H57C), C58(H58A,H58B,H58C), C59(H59A,H59B,
 H59C), C62(H62A,H62B,H62C)
;
_olex2_submission_special_instructions 'No special instructions were received'