Amine−Phenolate Ligands in Niobium Chemistry: π-Interactions Probed by an Ancillary Alkyne Ligand
Despagnet-Ayoub, Emmanuelle; Schigand, Sophie; Vendier, Laure; Etienne, Michel; Organometallics 28 (2009) 2188–; doi:10.1021/om801139m

data_4068870
_publ_section_title
;
 Amine&#x2212;Phenolate Ligands in Niobium Chemistry: \p-Interactions
 Probed by an Ancillary Alkyne Ligand
;
_journal_issue                   7
_journal_name_full               Organometallics
_journal_page_first              2188
_journal_paper_doi               10.1021/om801139m
_journal_volume                  28
_journal_year                    2009
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C18 H29 Cl2 N2 Nb1 O1'
_chemical_formula_sum            'C18 H29 Cl2 N2 Nb O'
_chemical_formula_weight         453.24
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_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
_cell_angle_alpha                90
_cell_angle_beta                 99.201(9)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.4994(6)
_cell_length_b                   13.1489(9)
_cell_length_c                   18.4670(14)
_cell_measurement_reflns_used    8000
_cell_measurement_temperature    180
_cell_measurement_theta_max      26.05
_cell_measurement_theta_min      1.65
_cell_measurement_wavelength     0.71073
_cell_volume                     2037.3(3)
_computing_cell_refinement       'Stoe IPDS software (Stoe, 1996)'
_computing_data_collection       'Stoe IPDS software (Stoe, 1996)'
_computing_data_reduction        'XRED (Stoe, 1.08, 1996)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Giacovazzo et al, 1993)'
_diffrn_ambient_temperature      180
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device       'Stoe IPDS'
_diffrn_measurement_method       \f
_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  0.0766
_diffrn_reflns_av_unetI/netI     0.0722
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            17456
_diffrn_reflns_theta_full        26.02
_diffrn_reflns_theta_max         26.02
_diffrn_reflns_theta_min         2.23
_diffrn_standards_decay_%        0.1
_diffrn_standards_interval_time  4
_diffrn_standards_number         200
_exptl_absorpt_coefficient_mu    0.861
_exptl_absorpt_correction_T_max  0.925
_exptl_absorpt_correction_T_min  0.781
_exptl_absorpt_correction_type   refdelf
_exptl_absorpt_process_details
;
        (See: Walker, N. & Stuart, D. (1983) Acta Cryst. A39, 158-166)
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.478
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             936
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.712
_refine_diff_density_min         -0.883
_refine_diff_density_rms         0.129
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.025
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     222
_refine_ls_number_reflns         3978
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.025
_refine_ls_R_factor_all          0.0834
_refine_ls_R_factor_gt           0.0401
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0495P)^2^+0.1494P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0857
_refine_ls_wR_factor_ref         0.1067
_reflns_number_gt                2487
_reflns_number_total             3978
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            om801139m_si_001.cif
_cod_data_source_block           manu020707
_cod_database_code               4068870