Controlling Both Ground- and Excited-State Thermal Barriers to Bergman Cyclization with Alkyne Termini Substitution
Mahendra Nath; Maren Pink; Jeffrey M. Zaleski; Journal of the American Chemical Society 127 (2005) 478–479; doi:10.1021/ja045979t

data_4111394
_publ_section_title
;
 Controlling Both Ground- and Excited-State Thermal Barriers to Bergman
 Cyclization with Alkyne Termini Substitution
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              478
_journal_page_last               479
_journal_paper_doi               10.1021/ja045979t
_journal_volume                  127
_journal_year                    2005
_chemical_formula_moiety         'C48 H26 N4 Zn'
_chemical_formula_sum            'C48 H26 N4 Zn'
_chemical_formula_weight         724.10
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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            4
_cell_length_a                   7.1219(7)
_cell_length_b                   20.2661(19)
_cell_length_c                   22.218(2)
_cell_measurement_reflns_used    5185
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      26.4
_cell_measurement_theta_min      2.7
_cell_volume                     3206.8(5)
_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 (Altomare 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 0.774
_diffrn_measured_fraction_theta_max 0.774
_diffrn_measurement_details
'0.30 degree frames measured for 60 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  0.0651
_diffrn_reflns_av_sigmaI/netI    0.0505
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            29387
_diffrn_reflns_theta_full        29.01
_diffrn_reflns_theta_max         29.01
_diffrn_reflns_theta_min         1.83
_exptl_absorpt_coefficient_mu    0.812
_exptl_absorpt_correction_T_max  0.9379
_exptl_absorpt_correction_T_min  0.8545
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, R. Blessing (1995)'
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.500
_exptl_crystal_density_meas      0
_exptl_crystal_description       needle
_exptl_crystal_F_000             1488
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.405
_refine_diff_density_min         -0.295
_refine_diff_density_rms         0.058
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     478
_refine_ls_number_reflns         6572
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0502
_refine_ls_R_factor_gt           0.0366
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0418P)^2^+0.6309P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0827
_refine_ls_wR_factor_ref         0.0888
_reflns_number_gt                5504
_reflns_number_total             6572
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja045979tsi20040713_061400.cif
_cod_data_source_block           03201
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'multi-scans' was replaced
with the value 'multi-scan' as specified in the replacement file
'src/cod-tools/trunk/data/replacement-values/replacement_values.lst'.

Automatic conversion script
Id: cif_fix_values 5376 2017-05-30 11:51:03Z andrius 
;
_cod_database_code               4111394