Group 2 metal (Mg, Ca, Sr) silylamides supported by a cyclen-derived macrocyclic polyamine
Mukherjee, Debabrata; Shirase, Satoru; Beckerle, Klaus; Spaniol, Thomas Paul; Mashima, Kazushi; Okuda, Jun; Dalton Trans.  (2017) –; doi:10.1039/C7DT01727H

data_7043218
_publ_section_title
;
 Group 2 metal (Mg, Ca, Sr) silylamides supported by a cyclen-derived
 macrocyclic polyamine
;
_journal_name_full               'Dalton Trans.'
_journal_paper_doi               10.1039/C7DT01727H
_journal_year                    2017
_chemical_formula_moiety         'C19 H54 N6 Si4 Sr'
_chemical_formula_sum            'C19 H54 N6 Si4 Sr'
_chemical_formula_weight         566.66
_chemical_name_systematic
;
 ?
;
_chemical_properties_physical
', Air-sensitive,Moisture-sensitive,Oxygen-sensitive'
_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   mixed
_audit_creation_method           SHELXL-2013
_audit_update_record
;
2017-03-13 deposited with the CCDC.
2017-06-02 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 121.6531(15)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   21.541(2)
_cell_length_b                   10.4100(11)
_cell_length_c                   16.409(5)
_cell_measurement_reflns_used    4596
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.86
_cell_measurement_theta_min      2.22
_cell_volume                     3132.2(11)
_computing_cell_refinement       'Bruker SMART (2001)'
_computing_data_collection       'Bruker SMART (2001)'
_computing_data_reduction        'Bruker SAINT+ (1999)'
_computing_molecular_graphics    'ORTEP-III (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SIR-92 (Altomare 1992)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-I CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  'multilayer optics'
_diffrn_radiation_source         microsource
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0444
_diffrn_reflns_av_unetI/netI     0.0324
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            21371
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.418
_diffrn_reflns_theta_min         2.221
_exptl_absorpt_coefficient_mu    1.891
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6535
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sadabs Bruker'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.202
_exptl_crystal_description       block
_exptl_crystal_F_000             1216
_exptl_crystal_recrystallization_method
'reactive crystallization from thf and pentane in a ratio of 1 : 9'
_exptl_crystal_size_max          0.420
_exptl_crystal_size_mid          0.380
_exptl_crystal_size_min          0.320
_refine_diff_density_max         0.339
_refine_diff_density_min         -0.320
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     202
_refine_ls_number_reflns         3922
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0386
_refine_ls_R_factor_gt           0.0290
_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^)+(0.0358P)^2^+1.3528P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0686
_refine_ls_wR_factor_ref         0.0718
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3311
_reflns_number_total             3922
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7dt01727h2.cif
_cod_data_source_block           2
_cod_database_code               7043218
_shelx_estimated_absorpt_t_min   0.504
_shelx_estimated_absorpt_t_max   0.583
_shelxl_version_number           2013-4
_shelx_res_checksum              825