Manganese(III)-mediated cyclodimerization of a hydrazinyl derivative generating an unprecedented 1,2,3,5,6-substituted leuco-verdazyl ring.
Tang, Jinkui; Nayak, Sanjit; Costa, José Sánchez; Robertazzi, Arturo; Pievo, Roberta; Mutikainen, Ilpo; Roubeau, Olivier; Teat, Simon J.; Gamez, Patrick; Reedijk, Jan; Dalton transactions (Cambridge, England : 2003) 39 (2010) 1361–1365; doi:10.1039/b917410a

data_7024469
_publ_section_title
;
 Manganese(III)-mediated cyclodimerization of a hydrazinyl derivative
 generating an unprecedented 1,2,3,5,6-substituted leuco-verdazyl ring.
;
_journal_issue                   5
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1361
_journal_page_last               1365
_journal_paper_doi               10.1039/b917410a
_journal_volume                  39
_journal_year                    2010
_chemical_formula_moiety         'C25 H22 N6 O3'
_chemical_formula_sum            'C25 H22 N6 O3'
_chemical_formula_weight         454.49
_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                 95.15(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.248(2)
_cell_length_b                   15.584(3)
_cell_length_c                   17.206(3)
_cell_measurement_reflns_used    35597
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.71
_cell_volume                     2202.7(8)
_computing_cell_refinement       'DirAx (Duisenberg 1992)'
_computing_data_collection       'COLLECT (Nonius, 2002)'
_computing_data_reduction        'COLLECT/EVAL (Nonius, 2002)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1990)'
_computing_publication_material  'SHELXTL (Sheldrick, 1990)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       \w-scan
_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  0.0378
_diffrn_reflns_av_sigmaI/netI    0.0263
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            35597
_diffrn_reflns_theta_full        27.55
_diffrn_reflns_theta_max         27.55
_diffrn_reflns_theta_min         2.71
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9724
_exptl_absorpt_correction_T_min  0.9724
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.370
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             952
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.239
_refine_diff_density_min         -0.230
_refine_diff_density_rms         0.045
_refine_ls_extinction_coef       0.0063(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     309
_refine_ls_number_reflns         5039
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0617
_refine_ls_R_factor_gt           0.0429
_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^)+(0.0417P)^2^+1.0490P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0947
_refine_ls_wR_factor_ref         0.1031
_reflns_number_gt                3967
_reflns_number_total             5039
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b917410a.txt
_cod_data_source_block           cv2yel
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7024469