Mechanistic Elucidation of the Stepwise Formation of a Tetranuclear Manganese Pinned Butterfly Cluster via N-N Bond Cleavage, Hydrogen Atom Transfer, and Cluster Rearrangement.
Hamilton, Clifton R.; Gau, Michael R.; Baglia, Regina A.; McWilliams, Sean F.; Zdilla, Michael J.; Journal of the American Chemical Society  (2014) 141218154447008–; doi:10.1021/ja508244x

data_4123115
_publ_section_title
;
 Mechanistic Elucidation of the Stepwise Formation of a Tetranuclear
 Manganese Pinned Butterfly Cluster via N-N Bond Cleavage, Hydrogen Atom
 Transfer, and Cluster Rearrangement.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              141218154447008
_journal_paper_doi               10.1021/ja508244x
_journal_year                    2014
_chemical_formula_moiety         'C34 H68 Mn2 N4 O2 Si4'
_chemical_formula_sum            'C34 H68 Mn2 N4 O2 Si4'
_chemical_formula_weight         787.16
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                89.739(3)
_cell_angle_beta                 86.275(3)
_cell_angle_gamma                77.148(2)
_cell_formula_units_Z            2
_cell_length_a                   11.1968(16)
_cell_length_b                   11.5552(16)
_cell_length_c                   17.838(3)
_cell_measurement_reflns_used    9858
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.984
_cell_measurement_theta_min      2.225
_cell_volume                     2245.2(6)
_computing_cell_refinement       'SAINT (Bruker AXS)'
_computing_data_collection       'COSMO (Bruker AXS)'
_computing_data_reduction        'SADABS (Bruker AXS)'
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 2008)'
_computing_publication_material  'APEX2 (Bruker AXS)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.974
_diffrn_measurement_device_type  'Bruker KAPPA APEX II DUO'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_unetI/netI     0.0315
_diffrn_reflns_Laue_measured_fraction_full 0.984
_diffrn_reflns_Laue_measured_fraction_max 0.974
_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       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            10586
_diffrn_reflns_point_group_measured_fraction_full 0.984
_diffrn_reflns_point_group_measured_fraction_max 0.974
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.041
_diffrn_reflns_theta_min         1.808
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.700
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6717
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
23600 Corrected reflections written to file 
 Estimated minimum and maximum transmission:  0.6717  0.7456
 The ratio of these values is more reliable than their absolute values!
 Additional spherical absorption correction applied with mu*r =  0.2000
 Lambda/2 correction factor = 0.0015
;
_exptl_crystal_colour            'pale pink'
_exptl_crystal_density_diffrn    1.164
_exptl_crystal_description       bar
_exptl_crystal_F_000             844
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.110
_exptl_crystal_size_min          0.080
_refine_diff_density_max         0.866
_refine_diff_density_min         -0.706
_refine_diff_density_rms         0.061
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     463
_refine_ls_number_reflns         10586
_refine_ls_number_restraints     76
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0506
_refine_ls_R_factor_gt           0.0426
_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^)+(0.0478P)^2^+1.6978P]
 where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1138
_refine_ls_wR_factor_ref         0.1189
_reflns_Friedel_coverage         0.000
_reflns_number_gt                8982
_reflns_number_total             10586
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja508244x_si_002.cif
_cod_data_source_block           1bTol
_cod_original_cell_volume        2245.3(5)
_cod_database_code               4123115
_shelx_estimated_absorpt_t_min   0.818
_shelx_estimated_absorpt_t_max   0.946
_shelxl_version_number           2013-2
_shelx_res_checksum              79294
_shelx_hkl_checksum              89669