Low-Nuclearity Magnesium Hydride Complexes Stabilized by N-Heterocyclic Carbenes
Freeman, Lucas; Walley, Jacob; Dickie, Diane Amanda; Gilliard, Robert J.; Dalton Transactions  (2019) –; doi:10.1039/C9DT03915E

data_7701833
_publ_section_title
;
 Low-Nuclearity Magnesium Hydride Complexes Stabilized by N-Heterocyclic
 Carbenes
;
_journal_name_full               'Dalton Transactions'
_journal_paper_doi               10.1039/C9DT03915E
_journal_year                    2019
_chemical_formula_sum            'C23 H52 Mg N4 Si4'
_chemical_formula_weight         521.35
_chemical_properties_physical    Air-sensitive,Moisture-sensitive
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_audit_update_record
;
2019-08-02 deposited with the CCDC.	2019-11-07 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 113.009(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.8930(12)
_cell_length_b                   12.1252(10)
_cell_length_c                   17.9168(13)
_cell_measurement_reflns_used    3206
_cell_measurement_temperature    100.(2)
_cell_measurement_theta_max      28.3412
_cell_measurement_theta_min      2.2235
_cell_volume                     3178.0(4)
_computing_cell_refinement       'SAINT V8.38A (Bruker AXS Inc., 2017)'
_computing_data_collection       'Bruker Instrument Service v2017.5.0.0'
_computing_data_reduction        'SAINT V8.38A (Bruker AXS Inc., 2017)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100.(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker Kappa APEXII CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0235
_diffrn_reflns_av_unetI/netI     0.0204
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            35995
_diffrn_reflns_theta_full        28.31
_diffrn_reflns_theta_max         28.31
_diffrn_reflns_theta_min         2.08
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.224
_exptl_absorpt_correction_T_max  0.92
_exptl_absorpt_correction_T_min  0.88
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 - Bruker AXS area detector scaling and absorption correction
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.090
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1144
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: hexanes'
_exptl_crystal_size_max          0.597
_exptl_crystal_size_mid          0.465
_exptl_crystal_size_min          0.406
_refine_diff_density_max         0.371
_refine_diff_density_min         -0.272
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     345
_refine_ls_number_reflns         7891
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0386
_refine_ls_R_factor_gt           0.0287
_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^)+(0.0336P)^2^+1.3590P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0718
_refine_ls_wR_factor_ref         0.0774
_reflns_number_gt                6685
_reflns_number_total             7891
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9dt03915e2.cif
_cod_data_source_block           3
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Multi-Scan' was
changed to 'multi-scan' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7701833
_shelx_res_checksum              43227