Isolation of electronic from geometric contributions to Bergman cyclization of metalloenediynes
Bhattacharyya, Sibaprasad; Clark, Aurora E.; Pink, Maren; Zaleski, Jeffrey M.; Chemical Communications (Cambridge, United Kingdom)  (2003) 1156–1157; doi:10.1039/b301690k

data_7103656
_publ_section_title
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 Isolation of electronic from geometric contributions to Bergman
 cyclization of metalloenediynes
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_journal_coden_ASTM              CHCOFS
_journal_issue                   10
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
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_journal_page_first              1156
_journal_page_last               1157
_journal_paper_doi               10.1039/b301690k
_journal_year                    2003
_chemical_formula_moiety         'C24 H24 N2'
_chemical_formula_sum            'C24 H24 N2'
_chemical_formula_weight         340.45
_space_group_IT_number           56
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ab 2ac'
_symmetry_space_group_name_H-M   'P c c n'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   15.2536(4)
_cell_length_b                   34.7020(10)
_cell_length_c                   7.1210(2)
_cell_measurement_reflns_used    8405
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      39.60
_cell_measurement_theta_min      2.22
_cell_volume                     3769.36(18)
_computing_cell_refinement       'SAINT (Bruker, 1999)'
_computing_data_collection       'SMART (Bruker, 1999)'
_computing_data_reduction        'SAINT (Bruker, 1999)'
_computing_molecular_graphics    'XTEL (local library)'
_computing_publication_material  'XCIF (Bruker, 1999), XTEL (local library)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR-92 (Alatomare et al., 1993)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector                 'CCD area detector'
_diffrn_detector_area_resol_mean 44.52
_diffrn_detector_type            'Bruker SMART 6000'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_details
'0.30 degree frames measured for 5 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  0.0459
_diffrn_reflns_av_sigmaI/netI    0.0268
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       55
_diffrn_reflns_limit_k_min       -54
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            68430
_diffrn_reflns_theta_full        35.00
_diffrn_reflns_theta_max         35.00
_diffrn_reflns_theta_min         2.21
_diffrn_standards_decay_%        0.0
_diffrn_standards_interval_time  151
_diffrn_standards_number         614
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  0.9930
_exptl_absorpt_correction_T_min  0.9793
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, R. Blessing (1995)'
_exptl_crystal_colour            brownish
_exptl_crystal_density_diffrn    1.200
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1456
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.564
_refine_diff_density_min         -0.166
_refine_diff_density_rms         0.060
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.100
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     259
_refine_ls_number_reflns         8308
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.100
_refine_ls_R_factor_all          0.0653
_refine_ls_R_factor_gt           0.0480
_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^)+(0.0846P)^2^+0.3427P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1315
_refine_ls_wR_factor_ref         0.1462
_reflns_number_gt                6378
_reflns_number_total             8308
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b301690k.txt
_cod_data_source_block           02027
_cod_depositor_comments
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The following automatic conversions were performed:

'_exptl_absorpt_correction_type' tag value 'multi-scans' was replaced
with 'multi-scan' value.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
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_cod_original_sg_symbol_H-M      Pccn
_cod_database_code               7103656