Synthesis and X-ray structures of new concave π-prismand hydrocarbon [2.2.1]m,p,p- and [2.2.1]p,p,p-cyclophanes
Lahtinen, Tanja; Wegelius, Elina; Rissanen, Kari; New Journal of Chemistry 25 (2001) 905–; doi:10.1039/b102725p

data_7051142
_publ_section_title
;
 Synthesis and X-ray structures of new concave \p-prismand hydrocarbon
 [2.2.1]m,p,p- and [2.2.1]p,p,p-cyclophanes
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_journal_issue                   7
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              905
_journal_paper_doi               10.1039/b102725p
_journal_volume                  25
_journal_year                    2001
_chemical_formula_sum            'C23 H22'
_chemical_formula_weight         298.41
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P -2bc 2a'
_symmetry_space_group_name_H-M   'P 21 n b'
_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                   10.2631(8)
_cell_length_b                   10.4883(5)
_cell_length_c                   15.9213(12)
_cell_measurement_temperature    173.0(1)
_cell_volume                     1713.8(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173.0(1)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0389
_diffrn_reflns_av_sigmaI/netI    0.0572
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            6372
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         3.78
_exptl_absorpt_coefficient_mu    0.065
_exptl_absorpt_correction_T_max  0.9935
_exptl_absorpt_correction_T_min  0.9808
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.157
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.122
_refine_diff_density_min         -0.128
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -3(6)
_refine_ls_extinction_coef       0.023(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     297
_refine_ls_number_reflns         2556
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.084
_refine_ls_R_factor_all          0.0494
_refine_ls_R_factor_gt           0.0371
_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^)+(0.0131P)^2^+0.0562P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0657
_refine_ls_wR_factor_ref         0.0688
_reflns_number_gt                2188
_reflns_number_total             2556
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b102725p.txt
_cod_data_source_block           15
_cod_database_code               7051142