180 degree unidirectional bond rotation in a biaryl lactone artificial molecular motor prototype.
Dahl, Bart J.; Branchaud, Bruce P.; Organic letters 8 (2006) 5841–5844; doi:10.1021/ol062428u

data_1506303
_publ_section_title
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 180 degree unidirectional bond rotation in a biaryl lactone artificial
 molecular motor prototype.
;
_journal_issue                   25
_journal_name_full               'Organic letters'
_journal_page_first              5841
_journal_page_last               5844
_journal_paper_doi               10.1021/ol062428u
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C19 H16 O5'
_chemical_formula_weight         324.32
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 94.738(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.764(2)
_cell_length_b                   21.989(6)
_cell_length_c                   8.721(2)
_cell_measurement_reflns_used    2234
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.34
_cell_measurement_theta_min      2.52
_cell_volume                     1483.8(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0291
_diffrn_reflns_av_sigmaI/netI    0.0357
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            9363
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.00
_diffrn_reflns_theta_min         1.85
_exptl_absorpt_coefficient_mu    0.105
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.508
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.452
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             680
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.256
_refine_diff_density_min         -0.194
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_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     285
_refine_ls_number_reflns         3177
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0575
_refine_ls_R_factor_gt           0.0447
_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^)+(0.0532P)^2^+0.3571P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1039
_refine_ls_wR_factor_ref         0.1134
_reflns_number_gt                2550
_reflns_number_total             3177
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol062428usi20061029_091427.cif
_cod_data_source_block           bran6
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1506303