Structural variations in bimetallic sodium-magnesium and sodium-zinc ketimides, and a sodium-zinc alkide-alkoxide-amide: connections to ring-stacking, ring-laddering, and inverse crown concepts.
Clegg, William; Dale, Sophie H; Graham, David V; Harrington, Ross W; Hevia, Eva; Hogg, Lorna M; Kennedy, Alan R; Mulvey, Robert E; Chemical communications (Cambridge, England)  (2007) 1641–1643; doi:10.1039/b618609b

data_7101858
_publ_section_title
;
 Structural variations in bimetallic sodium-magnesium and sodium-zinc
 ketimides, and a sodium-zinc alkide-alkoxide-amide: connections to
 ring-stacking, ring-laddering, and inverse crown concepts.
;
_journal_issue                   16
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              1641
_journal_page_last               1643
_journal_paper_doi               10.1039/b618609b
_journal_year                    2007
_chemical_formula_moiety         'C86 H80 N6 Na2 Zn2'
_chemical_formula_sum            'C86 H80 N6 Na2 Zn2'
_chemical_formula_weight         1374.28
_chemical_name_systematic
;
?
;
_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                 92.909(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.2031(12)
_cell_length_b                   27.339(3)
_cell_length_c                   20.0914(18)
_cell_measurement_reflns_used    7617
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.23
_cell_measurement_theta_min      2.41
_cell_volume                     7242.8(11)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker SMART 1K CCD diffractometer'
_diffrn_measurement_method       'thin-slice \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0285
_diffrn_reflns_av_sigmaI/netI    0.0275
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       35
_diffrn_reflns_limit_k_min       -34
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            63519
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.26
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.724
_exptl_absorpt_correction_T_max  0.801
_exptl_absorpt_correction_T_min  0.679
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SHELXTL'
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.260
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             2880
_exptl_crystal_size_max          0.58
_exptl_crystal_size_mid          0.53
_exptl_crystal_size_min          0.32
_refine_diff_density_max         0.966
_refine_diff_density_min         -0.982
_refine_diff_density_rms         0.092
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.328
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     976
_refine_ls_number_reflns         16561
_refine_ls_number_restraints     551
_refine_ls_restrained_S_all      1.320
_refine_ls_R_factor_all          0.0881
_refine_ls_R_factor_gt           0.0780
_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^)+(0.0000P)^2^+34.2827P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1809
_refine_ls_wR_factor_ref         0.1850
_reflns_number_gt                14269
_reflns_number_total             16561
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b618609b.txt
_cod_data_source_block           rem324_compound2
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7101858