Light-Driven Molecular Motors: Stepwise Thermal Helix Inversion during Unidirectional Rotation of Sterically Overcrowded Biphenanthrylidenes
Matthijs K. J. ter Wiel; Richard A. van Delden; Auke Meetsma; Ben L. Feringa; Journal of the American Chemical Society 127 (2005) 14208–14222; doi:10.1021/ja052201e

data_4111981
_publ_contact_author_address
;
     Crystal Structure Center,
     Chemical Physics,
     Materials Science Center,
     Groningen University,
     Nijenborgh 4,
     NL-9747 AG Groningen,
     The Netherlands.
;
_publ_contact_author_email       A.Meetsma@rug.nl
_publ_contact_author_fax         '+31 50 3634441'
_publ_contact_author_name
;
   Drs. A. Meetsma
;
_publ_contact_author_phone       '+31 50 3634368'
_publ_section_title
;
 Light-Driven Molecular Motors: Stepwise Thermal Helix Inversion during
 Unidirectional Rotation of Sterically Overcrowded Biphenanthrylidenes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14208
_journal_page_last               14222
_journal_paper_doi               10.1021/ja052201e
_journal_volume                  127
_journal_year                    2005
_chemical_compound_source        'by syntheses'
_chemical_formula_moiety         'C32 H32'
_chemical_formula_sum            'C32 H32'
_chemical_formula_weight         416.61
_space_group_IT_number           18
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2 2ab'
_symmetry_space_group_name_H-M   'P 21 21 2'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             1999-07-02
_audit_creation_method           'PLATON <TABLE ACC> option'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   9.042(1)
_cell_length_b                   18.855(1)
_cell_length_c                   6.767(1)
_cell_measurement_reflns_used    22
_cell_measurement_temperature    130
_cell_measurement_theta_max      20.52
_cell_measurement_theta_min      14.98
_cell_volume                     1153.7(2)
_computing_cell_refinement       'SET4 (de Boer & Duisenberg, 1984)'
_computing_data_collection       'CAD4-UNIX Software Version 5.1, 1994'
_computing_data_reduction        'HELENA (Spek, 1993)'
_computing_molecular_graphics
;
 PLUTO (Meetsma, 1997)
 ORTEP (Furrugia, 1998)
 PLATON (Spek, 1994, 1996)
;
_computing_publication_material  'PLATON (Spek, 1990)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997b)'
_computing_structure_solution
;
 SHELXS-97 (Sheldrick, 1997a)
;
_diffrn_ambient_temperature      130
_diffrn_measurement_device_type
;
     Enraf Nonius CAD-4F diffractometer
;
_diffrn_measurement_method       \w/2\q
_diffrn_radiation_detector
;
     scintillation NaI crystal with photomultiplier
;
_diffrn_radiation_monochromator  'perpendicular mounted graphite'
_diffrn_radiation_source         'fine focus sealed Philips Mo tube '
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     .71073
_diffrn_reflns_av_R_equivalents  0.0071
_diffrn_reflns_av_sigmaI/netI    0.0206
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       2
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            1480
_diffrn_reflns_reduction_process
;
 Intensity data were corrected for Lorentz and polarization  effects, scale
 variation, but not for absorption and reduced to F~o~^2^
;
_diffrn_reflns_theta_max         25.97
_diffrn_reflns_theta_min         2.16
_diffrn_standards_decay_%        0.5
_diffrn_standards_interval_time  180
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    .07
_exptl_crystal_colour            'colorless transparent'
_exptl_crystal_density_diffrn    1.199
_exptl_crystal_description       parallelepiped
_exptl_crystal_F_000             448
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_refine_diff_density_max         .177
_refine_diff_density_min         -.157
_refine_diff_density_rms         .038
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   10(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         1452
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0492
_refine_ls_R_factor_gt           0.0390
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0608P)^2^+0.2176P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0932
_refine_ls_wR_factor_ref         0.1005
_reflns_number_gt                1252
_reflns_number_total             1452
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja052201esi20050406_083221.cif
_cod_data_source_block           c16h16
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0608P)^2^+0.2176P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0608P)^2^+0.2176P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_database_code               4111981