Alkali-Metal Sandwich Complexes of a 1,2-Diaza-3,5-diborolyl Ligand Featuring η1, η2, η3, and η4Coordination Modes
Ly, Hanh V.; Forster, Taryn D.; Corrente, Andrea M.; Eisler, Dana J.; Konu, Jari; Parvez, Masood; Roesler, Roland; Organometallics 26 (2007) 1750–; doi:10.1021/om061091x

data_4072851
_publ_section_title
;
 Alkali-Metal Sandwich Complexes of a 1,2-Diaza-3,5-diborolyl Ligand
 Featuring \h1, \h2, \h3, and \h4Coordination Modes
;
_journal_issue                   7
_journal_name_full               Organometallics
_journal_page_first              1750
_journal_paper_doi               10.1021/om061091x
_journal_volume                  26
_journal_year                    2007
_chemical_formula_moiety         'C20 H27 B2 N2 Na'
_chemical_formula_sum            'C20 H27 B2 N2 Na'
_chemical_formula_weight         340.05
_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                 106.34(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.711(2)
_cell_length_b                   10.170(2)
_cell_length_c                   17.149(3)
_cell_measurement_temperature    173(2)
_cell_volume                     1960.0(7)
_computing_cell_refinement       'Nonius DENZO'
_computing_data_collection       'Nonius COLLECT'
_computing_data_reduction        'Nonius DENZO'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       'phi\omega 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  0.0268
_diffrn_reflns_av_sigmaI/netI    0.0387
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            6105
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         5.18
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.9966
_exptl_absorpt_correction_T_min  0.9569
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'SADABS (SHELXTL-NT v5.1, Bruker)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.152
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.278
_refine_diff_density_min         -0.273
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.070
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     231
_refine_ls_number_reflns         3418
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.070
_refine_ls_R_factor_all          0.0713
_refine_ls_R_factor_gt           0.0528
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0497P)^2^+1.3634P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1274
_refine_ls_wR_factor_ref         0.1371
_reflns_number_gt                2677
_reflns_number_total             3418
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om061091xsi20061130_020738.cif
_cod_data_source_block           3
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1959.8(7)
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               4072851