Double [2+2] Photocycloaddition: Topochemical Conversion of 4-Methyl-7-Styrylcoumarin Dimorphs into a Strained Cyclophane
Moorthy, Jarugu Narasimha; Venkatakrishnan, Parthasarathy; Crystal Growth & Design 7 (2007) 713–; doi:10.1021/cg060652k

data_4504015
_publ_section_title
;
 Double [2+2] Photocycloaddition:&#x00A0; Topochemical Conversion of
 4-Methyl-7-Styrylcoumarin Dimorphs into a Strained Cyclophane
;
_journal_issue                   4
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              713
_journal_paper_doi               10.1021/cg060652k
_journal_volume                  7
_journal_year                    2007
_chemical_formula_moiety         'C20 H21 O3 S'
_chemical_formula_sum            'C20 H21 O3 S'
_chemical_formula_weight         341.43
_chemical_melting_point          162
_chemical_name_common            cyclophane-bis-lactol
_chemical_name_systematic
;
 cyclophane-bis-lactol
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                   9.374(3)
_cell_length_b                   17.514(5)
_cell_length_c                   20.342(6)
_cell_measurement_reflns_used    97
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      24
_cell_measurement_theta_min      2
_cell_volume                     3339.7(17)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    WinGX
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_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  0.0976
_diffrn_reflns_av_sigmaI/netI    0.0641
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            14920
_diffrn_reflns_theta_full        24.00
_diffrn_reflns_theta_max         24.00
_diffrn_reflns_theta_min         2.00
_exptl_absorpt_coefficient_mu    0.209
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.358
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needles
_exptl_crystal_F_000             1448
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.246
_refine_diff_density_min         -0.237
_refine_diff_density_rms         0.057
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.081
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     259
_refine_ls_number_reflns         2607
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.081
_refine_ls_R_factor_all          0.0856
_refine_ls_R_factor_gt           0.0635
_refine_ls_shift/su_max          0.255
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0439P)^2^+3.9823P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1293
_refine_ls_wR_factor_ref         0.1378
_reflns_number_gt                2028
_reflns_number_total             2607
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg060652ksi20060928_013026.cif
_cod_data_source_block           cyclophane-bis-lactol
_cod_original_cell_volume        3339.8(16)
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               4504015