A Practical Synthesis of Bridged Diarylacetylenes
Ruchi Shukla; Daniel M. Brody; Sergey V. Lindeman; Rajendra Rathore; Journal of Organic Chemistry 71 (2006) 6124–6129; doi:10.1021/jo060817w

data_4021853
_publ_section_title
;
 A Practical Synthesis of Bridged Diarylacetylenes
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              6124
_journal_page_last               6129
_journal_paper_doi               10.1021/jo060817w
_journal_volume                  71
_journal_year                    2006
_chemical_formula_sum            'C26 H34 O4'
_chemical_formula_weight         410.53
_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                 90.694(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.635(3)
_cell_length_b                   7.9222(14)
_cell_length_c                   20.448(4)
_cell_measurement_reflns_used    6912
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30
_cell_measurement_theta_min      3
_cell_volume                     2208.7(7)
_computing_cell_refinement       'SAINT v7.23A (Bruker, 2005)'
_computing_data_collection       'APEX2 v2.0-2 (Bruker, 2005)'
_computing_data_reduction        'SADABS-2004/1 (Bruker, 2005)'
_computing_molecular_graphics    'XP v5.1 (Bruker, 1998)'
_computing_publication_material  'XCIF v6.12 (Bruker, 2001)'
_computing_structure_refinement  'SHELXL-97 v.97-2 (Sheldrick, 1993-1997)'
_computing_structure_solution    'XS/SHELXTL v6.12 (Bruker, 2001)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.950
_diffrn_measured_fraction_theta_max 0.950
_diffrn_measurement_device_type  'Bruker APEX2 CCD detector'
_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  0.0425
_diffrn_reflns_av_sigmaI/netI    0.0353
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            36328
_diffrn_reflns_theta_full        32.00
_diffrn_reflns_theta_max         32.00
_diffrn_reflns_theta_min         1.79
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.9895
_exptl_absorpt_correction_T_min  0.9650
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.235
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             888
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.463
_refine_diff_density_min         -0.198
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         7295
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0645
_refine_ls_R_factor_gt           0.0468
_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^)+(0.0721P)^2^+0.1398P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1186
_refine_ls_wR_factor_ref         0.1279
_reflns_number_gt                5602
_reflns_number_total             7295
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo060817wsi20060418_111255.cif
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4021853