Polyhedral monocarbaborane chemistry. Routes to neutral, monoanionic and dianionic carbo-carbaborane-rods.
John D. Kennedy; Neil J. Bullen; Andreas Franken; Colin A. Kilner; Chemical communications (Cambridge, England)  (2003) –; doi:10.1039/b303589a

data_7103754
_publ_section_title
;
Polyhedral monocarbaborane chemistry. Routes to
neutral, monoanionic and dianionic carbo-carbaborane-rods.
;
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_paper_doi               10.1039/b303589a
_journal_year                    2003
_chemical_formula_sum            'C38 H72 B18 N4 O2'
_chemical_formula_weight         811.58
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 102.9230(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.25280(10)
_cell_length_b                   24.5742(3)
_cell_length_c                   14.40150(10)
_cell_measurement_temperature    150(2)
_cell_volume                     4916.38(8)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1996)'
_computing_data_collection       'COLLECT (Nonius, 1999)'
_computing_data_reduction        'DENZO-SMN (Otwinowski & Minor, 1996)'
_computing_molecular_graphics
;
ORTEP3 for Windows (Farrugia, 1997)
XSeed (Barbour, 2001)
;
_computing_publication_material  'WC (Thornton-Pett, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type
'Nonius KappaCCD area detector diffractometer'
_diffrn_measurement_method
;
Detector set at 30mm from sample with different 2theta offsets 
1 degree phi exposures for chi=0 degree settings
1 degree omega exposures for chi=90 degree settings
;
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0674
_diffrn_reflns_av_sigmaI/netI    0.0369
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -30
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            67006
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.00
_exptl_absorpt_coefficient_mu    0.061
_exptl_absorpt_correction_T_max  0.9958
_exptl_absorpt_correction_T_min  0.9821
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Using multiple and symmetry-related data measurements via the program SORTAV
See R.H. Blessing, Acta Cryst (1995), A51, 33-38 
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.096
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1736
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.07
_refine_diff_density_max         1.086
_refine_diff_density_min         -0.281
_refine_diff_density_rms         0.097
_refine_ls_extinction_coef       0.0151(19)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.013
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     576
_refine_ls_number_reflns         9637
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0773
_refine_ls_R_factor_gt           0.0619
_refine_ls_shift/su_max          0.069
_refine_ls_shift/su_mean         0.008
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1102P)^2^+1.9052P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1691
_refine_ls_wR_factor_ref         0.1882
_reflns_number_gt                7882
_reflns_number_total             9637
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b303589a.txt
_cod_data_source_block           c:\windows\desktop\andy\struct~1\conh28~1\sx
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7103754