Stabilization of a two-coordinate, acyclic diaminosilylene (ADASi): completion of the series of isolable diaminotetrylenes, :E(NR2)2 (E = group 14 element).
Hadlington, Terrance J.; Abdalla, Joseph A. B.; Tirfoin, Rémi; Aldridge, Simon; Jones, Cameron; Chemical communications (Cambridge, England) 52 (2016) 1717–1720; doi:10.1039/c5cc09673a

data_7118529
_publ_section_title
;
 Stabilization of a two-coordinate, acyclic diaminosilylene (ADASi):
 completion of the series of isolable diaminotetrylenes, :E(NR2)2 (E =
 group 14 element).
;
_journal_issue                   8
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              1717
_journal_page_last               1720
_journal_paper_doi               10.1039/c5cc09673a
_journal_volume                  52
_journal_year                    2016
_chemical_formula_sum            'C58 H90 B2 N6 Pb Si2'
_chemical_formula_weight         1156.35
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2015-11-23 deposited with the CCDC.
2015-12-03 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 97.8960(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   26.6148(7)
_cell_length_b                   12.0185(4)
_cell_length_c                   18.1788(5)
_cell_measurement_temperature    123(2)
_cell_volume                     5759.7(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Oxford Gemini Ultra'
_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  0.0955
_diffrn_reflns_av_sigmaI/netI    0.0650
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            49975
_diffrn_reflns_theta_full        26.64
_diffrn_reflns_theta_max         26.64
_diffrn_reflns_theta_min         3.01
_exptl_absorpt_coefficient_mu    3.012
_exptl_absorpt_correction_T_max  0.749
_exptl_absorpt_correction_T_min  0.581
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SCALE3 ABSPACK'
_exptl_crystal_colour            red-orange
_exptl_crystal_density_diffrn    1.334
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2400
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.111
_refine_diff_density_min         -1.179
_refine_diff_density_rms         0.118
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     331
_refine_ls_number_reflns         6035
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0576
_refine_ls_R_factor_gt           0.0365
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0173P)^2^+10.2280P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0596
_refine_ls_wR_factor_ref         0.0661
_reflns_number_gt                4797
_reflns_number_total             6035
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5cc09673a2.cif
_cod_data_source_block           compound3
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7118529