<i>catena</i>-Poly[sodium-μ~2~-(<i>N</i>,<i>N</i>,<i>N</i>',<i>N</i>'-tetramethylethane-1,2-diamine)-κ^2^<i>N</i>:<i>N</i>'-sodium-bis[μ~2~-bis(trimethylsilyl)azanido-κ^2^<i>N</i>:<i>N</i>]]
Kennedy, Alan R.; Mulvey, Robert E.; O'Hara, Charles T.; Robertson, Stuart D.; Robertson, Gemma M.; Acta Crystallographica Section E 68 (2012) m1468–; doi:10.1107/S1600536812045126

data_2236983
_publ_section_title
;
 <i>catena</i>-Poly[sodium-\m~2~-(<i>N</i>,<i>N</i>,<i>N</i>',<i>N</i>'-tetramethylethane-1,2-diamine)-\k^2^<i>N</i>:<i>N</i>'-sodium-bis[\m~2~-bis(trimethylsilyl)azanido-\k^2^<i>N</i>:<i>N</i>]]
;
_journal_coeditor_code           PK2451
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              m1468
_journal_paper_doi               10.1107/S1600536812045126
_journal_volume                  68
_journal_year                    2012
_chemical_formula_iupac          '[Na2 (C6 H18 N Si2)2 (C6 H16 N2)]'
_chemical_formula_moiety         'C18 H52 N4 Na2 Si4'
_chemical_formula_sum            'C18 H52 N4 Na2 Si4'
_chemical_formula_weight         482.98
_chemical_name_systematic
;
<i>catena</i>-Poly[sodium-\m~2~-(<i>N</i>,<i>N</i>,<i>N</i>',<i>N</i>'-
tetramethylethane-1,2-diamine)-\k^2^<i>N</i>:<i>N</i>'-sodium-
bis[\m~2~-bis(trimethylsilyl)azanido-\k^2^<i>N</i>:<i>N</i>]]
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 113.523(14)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.9761(12)
_cell_length_b                   13.8292(12)
_cell_length_c                   11.7983(14)
_cell_measurement_reflns_used    4914
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      29.08
_cell_measurement_theta_min      2.94
_cell_volume                     1492.4(3)
_computing_cell_refinement       'CrysAlis PRO (Oxford Diffraction, 2010)'
_computing_data_collection       'CrysAlis PRO (Oxford Diffraction, 2010)'
_computing_data_reduction        'CrysAlis PRO (Oxford Diffraction, 2010)'
_computing_molecular_graphics    'DIAMOND (Brandenburg, 1999)'
_computing_publication_material  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.854
_diffrn_measurement_device_type  'Oxford Diffraction Gemini S'
_diffrn_measurement_method       '\w scans'
_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  0.0123
_diffrn_reflns_av_sigmaI/netI    0.0149
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            8332
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         29.14
_diffrn_reflns_theta_min         2.95
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.240
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.942
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
(CrysAlis PRO; Oxford Diffraction, 2009)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.075
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             532
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.371
_refine_diff_density_min         -0.183
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.073
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     135
_refine_ls_number_reflns         3436
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.073
_refine_ls_R_factor_all          0.0265
_refine_ls_R_factor_gt           0.0227
_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^)+(0.0371P)^2^+0.2964P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0663
_refine_ls_wR_factor_ref         0.0674
_reflns_number_gt                3064
_reflns_number_total             3436
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            pk2451.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2236983
_cod_database_fobs_code          2236983