Accelerated Bergman cyclization of porphyrinic-enediynes
Nath, Mahendra; Huffman, John C.; Zaleski, Jeffrey M.; Chemical Communications (Cambridge, United Kingdom)  (2003) 858–859; doi:10.1039/b212923j

data_7113549
_publ_section_title
;
 Accelerated Bergman cyclization of porphyrinic-enediynes
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   7
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              858
_journal_page_last               859
_journal_paper_doi               10.1039/b212923j
_journal_year                    2003
_chemical_formula_moiety         C54H46N4Si2
_chemical_formula_sum            'C54 H46 N4 Si2'
_chemical_formula_weight         807.13
_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
_audit_creation_date             10/27/2002
_audit_creation_method           SHELXL-97
_cell_angle_alpha                115.102(3)
_cell_angle_beta                 104.733(3)
_cell_angle_gamma                93.997(3)
_cell_formula_units_Z            2
_cell_length_a                   12.5229(13)
_cell_length_b                   13.1739(14)
_cell_length_c                   15.3064(16)
_cell_measurement_reflns_used    3326
_cell_measurement_temperature    133(2)
_cell_measurement_theta_max      26.63
_cell_measurement_theta_min      2.18
_cell_volume                     2165.6(4)
_computing_cell_refinement       'SAINT (Bruker, 1999)'
_computing_data_collection       'SMART (Bruker, 1999)'
_computing_data_reduction        'SAINT (Bruker, 1999), XTEL (local package)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      133(2)
_diffrn_detector                 'CCD area detector'
_diffrn_detector_area_resol_mean 44.52
_diffrn_detector_type            'Bruker SMART 6000'
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_details
'   0.30 degree frames measured for  30.16 seconds each'
_diffrn_measurement_device       'three-circle goniometer with fixed chi'
_diffrn_measurement_device_type  'Bruker Platform goniometer'
_diffrn_measurement_method       '\w 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  0.1731
_diffrn_reflns_av_sigmaI/netI    0.2533
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            32370
_diffrn_reflns_theta_full        27.68
_diffrn_reflns_theta_max         27.68
_diffrn_reflns_theta_min         2.18
_diffrn_standards_decay_%        0.0
_exptl_absorpt_coefficient_mu    0.125
_exptl_absorpt_correction_T_max  0.9975
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            brown/orange
_exptl_crystal_density_diffrn    1.238
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             852
_exptl_crystal_id                MSC02141
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.02
_refine_diff_density_max         1.118
_refine_diff_density_min         -0.494
_refine_diff_density_rms         0.087
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.859
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     547
_refine_ls_number_reflns         10026
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.859
_refine_ls_R_factor_all          0.2311
_refine_ls_R_factor_gt           0.0830
_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^)+(0.1047P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1893
_refine_ls_wR_factor_ref         0.2496
_reflns_number_gt                3439
_reflns_number_total             10026
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             7104048
_cod_data_source_file            b212923j.txt
_cod_data_source_block           02141
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7113549