Rapid Access to Substituted Piperazines via Ti(NMe2)4-Mediated C‒C Bond-Making Reactions
Chen, Zhou; Wu, Jian; Chen, Yanmei; Li, Lei; Xia, Yuanzhi; Li, Yahong; Liu, Wei; Lei, Tao; Yang, Lijuan; Gao, Dandan; Li, Wu; Organometallics 31 (2012) 6005–; doi:10.1021/om300022u

data_4078978
_publ_section_title
;
 Rapid Access to Substituted Piperazines via Ti(NMe2)4-Mediated C--C
 Bond-Making Reactions
;
_journal_issue                   17
_journal_name_full               Organometallics
_journal_page_first              6005
_journal_paper_doi               10.1021/om300022u
_journal_volume                  31
_journal_year                    2012
_chemical_formula_moiety         'C30 H42 N10 Ti2, 2(C7 H8)'
_chemical_formula_sum            'C44 H58 N10 Ti2'
_chemical_formula_weight         822.80
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 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                 110.342(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.430(4)
_cell_length_b                   14.089(4)
_cell_length_c                   13.738(4)
_cell_measurement_temperature    293(2)
_cell_volume                     2255.8(12)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0533
_diffrn_reflns_av_sigmaI/netI    0.0427
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            20904
_diffrn_reflns_theta_full        25.10
_diffrn_reflns_theta_max         25.10
_diffrn_reflns_theta_min         3.09
_exptl_absorpt_coefficient_mu    0.395
_exptl_absorpt_correction_T_max  0.9323
_exptl_absorpt_correction_T_min  0.7427
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.211
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             872
_exptl_crystal_size_max          0.80
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.695
_refine_diff_density_min         -0.443
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.207
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     224
_refine_ls_number_reflns         4015
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.207
_refine_ls_R_factor_all          0.1180
_refine_ls_R_factor_gt           0.0998
_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^)+(0.1095P)^2^+3.3130P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2485
_refine_ls_wR_factor_ref         0.2590
_reflns_number_gt                3398
_reflns_number_total             4015
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om300022u_si_003.cif
_cod_data_source_block           1
_cod_original_cell_volume        2255.8(11)
_cod_original_sg_symbol_H-M      'P 21/a'
_cod_database_code               4078978