M=Nα Cycloaddition and Nα-Nβ Insertion in the Reactions of Titanium Hydrazido Compounds with Alkynes: A Combined Experimental and Computational Study
A. Daniel Schofield; Ainara Nova; Jonathan D. Selby; Catherine D. Manley; Andrew D. Schwarz; Eric Clot; Philip Mountford; Journal of the American Chemical Society 132 (2010) 10484–10497; doi:10.1021/ja1036513

data_4102745
_publ_contact_author
;
 Professor P Mountford           
 Chemistry Reaearch Laboratory
 Mansfield Road
 Oxford
 OX1 3TA
 UK
;
_publ_contact_author_email       Philip.Mountford@chem.ox.ac.uk
_publ_contact_author_fax         '+44 1865 285141'
_publ_contact_author_phone       '+44 1865 285140'
_publ_section_title
;
 M=N\a Cycloaddition and N\a-N\b Insertion in the Reactions of Titanium
 Hydrazido Compounds with Alkynes: A Combined Experimental and
 Computational Study
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              10484
_journal_page_last               10497
_journal_paper_doi               10.1021/ja1036513
_journal_volume                  132
_journal_year                    2010
_chemical_formula_moiety         'C68 H94 F4 N12 Si4 Ti2'
_chemical_formula_sum            'C68 H94 F4 N12 Si4 Ti2'
_chemical_formula_weight         1363.71
_chemical_name_systematic
;
[Ti(N2NMe){NCC(Me)NPh2}(py)]2(m-2,3,5,6-C6F4)
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                82.9647(5)
_cell_angle_beta                 73.1733(5)
_cell_angle_gamma                66.2377(6)
_cell_formula_units_Z            1
_cell_length_a                   10.07570(10)
_cell_length_b                   12.3241(2)
_cell_length_c                   16.9363(2)
_cell_measurement_reflns_used    8071
_cell_measurement_temperature    150
_cell_measurement_theta_max      27
_cell_measurement_theta_min      5
_cell_volume                     1842.31(4)
_computing_cell_refinement       'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1997-2001).'
_computing_data_reduction        'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device       'Nonius KappaCCD'
_diffrn_measurement_device_type  Area
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.041
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            39225
_diffrn_reflns_theta_full        26.407
_diffrn_reflns_theta_max         27.507
_diffrn_reflns_theta_min         5.110
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.339
_exptl_absorpt_correction_T_max  0.93
_exptl_absorpt_correction_T_min  0.84
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.229
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             722
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.71
_refine_diff_density_min         -0.42
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.1088
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     406
_refine_ls_number_reflns         6224
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0640
_refine_ls_R_factor_gt           0.0475
_refine_ls_shift/su_max          0.000677
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) 
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)] 
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax 
 Method = Robust Weighting (Prince, 1982) 
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^ 
 A~i~ are: 
 0.613 0.315 0.337 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0575
_refine_ls_wR_factor_gt          0.0483
_refine_ls_wR_factor_ref         0.0475
_reflns_limit_h_max              13
_reflns_limit_h_min              -12
_reflns_limit_k_max              16
_reflns_limit_k_min              -15
_reflns_limit_l_max              22
_reflns_limit_l_min              0
_reflns_number_gt                6693
_reflns_number_total             8372
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.26
_oxford_diffrn_Wilson_scale      5.28
_oxford_refine_ls_r_factor_ref   0.0430
_oxford_refine_ls_scale          0.4390(6)
_oxford_reflns_number_all        8372
_oxford_reflns_threshold_expression_ref I>3.0\s(I)
_cod_data_source_file            ja1036513_si_002_6.cif
_cod_data_source_block           compound_20
_cod_original_sg_symbol_H-M      'P -1 '
_cod_database_code               4102745