Kinetic stabilisation of a molecular strontium hydride complex using an extremely bulky amidinate ligand.
de Bruin-Dickason, Caspar N; Sutcliffe, Thomas; Alvarez Lamsfus, Carlos; Deacon, Glen B.; Maron, Laurent; Jones, Cameron; Chemical communications (Cambridge, England) 54 (2018) 786–789; doi:10.1039/c7cc09362d

data_7121073
_publ_section_title
;
 Kinetic stabilisation of a molecular strontium hydride complex using an
 extremely bulky amidinate ligand.
;
_journal_issue                   7
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              786
_journal_page_last               789
_journal_paper_doi               10.1039/c7cc09362d
_journal_volume                  54
_journal_year                    2018
_chemical_formula_sum            'C52 H58 N2'
_chemical_formula_weight         711.00
_space_group_IT_number           33
_space_group_name_Hall           'P 2c -2n'
_space_group_name_H-M_alt        'P n a 21'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2017-12-05 deposited with the CCDC.
2018-01-02 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.6472(9)
_cell_length_b                   22.0745(11)
_cell_length_c                   10.8828(6)
_cell_measurement_reflns_used    6289
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      20.61
_cell_measurement_theta_min      2.31
_cell_volume                     4239.4(4)
_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 2008)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker Apex X8'
_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  0.0787
_diffrn_reflns_av_sigmaI/netI    0.0650
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            48025
_diffrn_reflns_theta_full        26.08
_diffrn_reflns_theta_max         26.08
_diffrn_reflns_theta_min         2.96
_exptl_absorpt_coefficient_mu    0.064
_exptl_absorpt_correction_T_max  0.994
_exptl_absorpt_correction_T_min  0.989
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sortav (Blessing)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.114
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1536
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.321
_refine_diff_density_min         -0.253
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(3)
_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     500
_refine_ls_number_reflns         7078
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0783
_refine_ls_R_factor_gt           0.0503
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0654P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1086
_refine_ls_wR_factor_ref         0.1234
_reflns_number_gt                5312
_reflns_number_total             7078
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7cc09362d2.cif
_cod_data_source_block           compound2S
_cod_depositor_comments
'Adding full bibliography for 7121071--7121080.cif.'
_cod_original_sg_symbol_H-M      Pna2(1)
_cod_database_code               7121073