A facile access to substituted benzo[a]fluorenes from o-alkynylbenzaldehydes via in situ formed acetals
Seetharaman Manojveer; Rengarajan Balamurugan; Chem.Commun. 50 (2014) 9925–; doi:10.1039/C4cc03934C

data_7115500
_publ_section_title
;
 A facile access to substituted benzo[a]fluorenes from
 o-alkynylbenzaldehydes via in situ formed acetals
;
_journal_name_full               Chem.Commun.
_journal_page_first              9925
_journal_paper_doi               10.1039/C4cc03934C
_journal_volume                  50
_journal_year                    2014
_chemical_formula_moiety         'C30 H22 O'
_chemical_formula_sum            'C30 H22 O'
_chemical_formula_weight         398.48
_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                 91.123(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.7885(9)
_cell_length_b                   8.7362(8)
_cell_length_c                   22.4105(16)
_cell_measurement_reflns_used    1225
_cell_measurement_temperature    298
_cell_measurement_theta_max      22.0270
_cell_measurement_theta_min      3.1470
_cell_volume                     2111.8(3)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Xcalibur, Eos, Gemini'
_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  0.0512
_diffrn_reflns_av_sigmaI/netI    0.0897
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            9034
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         2.96
_exptl_absorpt_coefficient_mu    0.074
_exptl_absorpt_correction_T_max  0.9890
_exptl_absorpt_correction_T_min  0.9853
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.253
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Needle
_exptl_crystal_F_000             840
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.156
_refine_diff_density_min         -0.162
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     281
_refine_ls_number_reflns         4315
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.1430
_refine_ls_R_factor_gt           0.0656
_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^)+(0.0389P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1151
_refine_ls_wR_factor_ref         0.1449
_reflns_number_gt                2162
_reflns_number_total             4315
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4cc03934c2.cif
_cod_data_source_block           smv
_cod_database_code               7115500