4-Methoxy- and 4-cyano-substituted lithium aryloxides: electronic effects of substituents on aggregation.
MacDougall, Dugald J.; Noll, Bruce C.; Kennedy, Alan R.; Henderson, Kenneth W.; Dalton transactions (Cambridge, England : 2003)  (2006) 1875–1884; doi:10.1039/b515011f

data_7006878
_publ_section_title
;
 4-Methoxy- and 4-cyano-substituted lithium aryloxides: electronic
 effects of substituents on aggregation.
;
_journal_issue                   15
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1875
_journal_page_last               1884
_journal_paper_doi               10.1039/b515011f
_journal_year                    2006
_chemical_formula_moiety         'C34 H28 Li2 N6 O2, C5 H5 N'
_chemical_formula_sum            'C39 H33 Li2 N7 O2'
_chemical_formula_weight         645.60
_chemical_name_common            'lithium 4-cyanophenoxide pyridine'
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 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                 122.969(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   26.4622(9)
_cell_length_b                   9.1840(5)
_cell_length_c                   17.4818(9)
_cell_measurement_reflns_used    3252
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      25.03
_cell_measurement_theta_min      1.00
_cell_volume                     3564.4(3)
_computing_data_collection       'Denzo & Collect'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       'phi and 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  0.0574
_diffrn_reflns_av_sigmaI/netI    0.0781
_diffrn_reflns_limit_h_max       31
_diffrn_reflns_limit_h_min       -31
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            6016
_diffrn_reflns_theta_full        24.95
_diffrn_reflns_theta_max         24.95
_diffrn_reflns_theta_min         1.39
_exptl_absorpt_coefficient_mu    0.076
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'clear colorless'
_exptl_crystal_density_diffrn    1.203
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1352
_exptl_crystal_size_max          0.70
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.519
_refine_diff_density_min         -0.354
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     437
_refine_ls_number_reflns         3323
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.1142
_refine_ls_R_factor_gt           0.0638
_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^)+(0.0508P)^2^+5.5440P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1268
_refine_ls_wR_factor_ref         0.1474
_reflns_number_gt                2221
_reflns_number_total             3323
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            b515011f.txt
_cod_data_source_block           hend23
_cod_original_sg_symbol_H-M      C2
_cod_database_code               7006878