The preparation and full characterization of dichloroferrous complexes of mono-, bis- and tris-α-methyl substituted tris(2-pyridylmethyl)amine (TPA) ligands. Structural bases of stability of the complexes in solution
Benhamou, Laila; Lachkar, Mohammed; Mandon, Dominique; Welter, Richard; Dalton Transactions  (2008) 6996–7003; doi:10.1039/b808205g

data_7004512
_publ_section_title
;
 The preparation and full characterization of dichloroferrous complexes
 of mono-, bis- and tris-\a-methyl substituted
 tris(2-pyridylmethyl)amine (TPA) ligands. Structural bases of
 stability of the complexes in solution
;
_journal_issue                   48
_journal_name_full               'Dalton Transactions'
_journal_page_first              6996
_journal_page_last               7003
_journal_paper_doi               10.1039/b808205g
_journal_year                    2008
_chemical_formula_moiety         'C20 H22 Cl2 Fe N4'
_chemical_formula_sum            'C20 H22 Cl2 Fe N4'
_chemical_formula_weight         445.17
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 118.8660(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.88300(10)
_cell_length_b                   28.5770(5)
_cell_length_c                   8.9750(2)
_cell_measurement_reflns_used    5251
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      30.034
_cell_measurement_theta_min      0.998
_cell_volume                     1995.22(6)
_computing_cell_refinement       'Denzo (Nonius B.V., 1998)'
_computing_data_collection       'Collect (Nonius B.V., 1998)'
_computing_data_reduction        'Denzo (Nonius B.V., 1998)'
_computing_molecular_graphics    'PLATON 98 (Spek, 1998)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       '\p 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  0.0351
_diffrn_reflns_av_sigmaI/netI    0.0661
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       35
_diffrn_reflns_limit_k_min       -40
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            10121
_diffrn_reflns_theta_full        30.05
_diffrn_reflns_theta_max         30.05
_diffrn_reflns_theta_min         2.65
_exptl_absorpt_coefficient_mu    1.036
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.482
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             920
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.341
_refine_diff_density_min         -0.794
_refine_diff_density_rms         0.103
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     244
_refine_ls_number_reflns         5828
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0712
_refine_ls_R_factor_gt           0.0431
_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^)+(0.0546P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1013
_refine_ls_wR_factor_ref         0.1141
_reflns_number_gt                4169
_reflns_number_total             5828
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b808205g.txt
_cod_data_source_block           Me2TPAFeCl2
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7004512