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_4123125
_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         '[C2.5H6],[MnN4Si4C22H44]'
_chemical_formula_sum            'C24.5 H50 Mn N4 Si4'
_chemical_formula_weight         567.98
_chemical_melting_point          ?
_chemical_name_common            MnBisBpy
_chemical_name_systematic
;
 ?
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 106.295(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.1502(19)
_cell_length_b                   28.231(4)
_cell_length_c                   8.2921(10)
_cell_measurement_reflns_used    4902
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.015
_cell_measurement_theta_min      2.578
_cell_volume                     3404.1(8)
_computing_cell_refinement       'SAINT (Bruker-AXS)'
_computing_data_collection       'COSMO (Bruker-AXS)'
_computing_data_reduction        'SADABS (Bruker-AXS)'
_computing_molecular_graphics    XP
_computing_publication_material  'APEX2 Report Generator (Bruker-AXS)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Kappa APEX II DUO'
_diffrn_measurement_method       'Omega Scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0211
_diffrn_reflns_av_unetI/netI     0.0256
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       33
_diffrn_reflns_limit_k_min       -37
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            11493
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.045
_diffrn_reflns_theta_min         1.443
_diffrn_source                   'Fine-focused sealed tube'
_exptl_absorpt_coefficient_mu    0.547
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6948
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
   11605 Corrected reflections written to file mo_1399_0m.hkl
 Estimated minimum and maximum transmission:  0.6948  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            Red
_exptl_crystal_density_diffrn    1.108
_exptl_crystal_density_meas      ?
_exptl_crystal_description       Needle
_exptl_crystal_F_000             1224
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.100
_platon_squeeze_details
;
;
_refine_diff_density_max         0.454
_refine_diff_density_min         -0.216
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     147
_refine_ls_number_reflns         4108
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0357
_refine_ls_R_factor_gt           0.0285
_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^)+(0.0443P)^2^+1.0497P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0744
_refine_ls_wR_factor_ref         0.0768
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3517
_reflns_number_total             4108
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja508244x_si_002.cif
_cod_data_source_block           MnNR2Bpy
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value 'Not Determined' was changed to '?' -
the value is undefined or not
given.

'_exptl_absorpt_correction_type' value 'Multi-scan' changed
to 'multi-scan' according to
/home/saulius/struct/COD-crude-data--automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2935 2014-11-11 08:27:57Z andrius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'Not Measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_cell_volume        3404.1(7)
_cod_original_formula_sum        'C24.50 H50 Mn N4 Si4'
_cod_database_code               4123125
_shelx_estimated_absorpt_t_min   0.853
_shelx_estimated_absorpt_t_max   0.947
_shelxl_version_number           2013-3
_shelx_res_checksum              95529
_shelx_hkl_checksum              18319