Exploring the boundaries of a light-driven molecular motor design: new sterically overcrowded alkenes with preferred direction of rotation.
van Delden, Richard A.; ter Wiel, Matthijs K. J.; de Jong, Harmen; Meetsma, Auke; Feringa, Ben L.; Organic & biomolecular chemistry 2 (2004) 1531–1541; doi:10.1039/b402222j

data_7150374
_publ_section_title
;
 Exploring the boundaries of a light-driven molecular motor design: new
 sterically overcrowded alkenes with preferred direction of rotation.
;
_journal_issue                   10
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              1531
_journal_page_last               1541
_journal_paper_doi               10.1039/b402222j
_journal_volume                  2
_journal_year                    2004
_chemical_compound_source        'see text'
_chemical_formula_moiety         'C27 H20 S2'
_chemical_formula_sum            'C27 H20 S2'
_chemical_formula_weight         408.59
_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   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   direct
_cell_angle_alpha                90
_cell_angle_beta                 100.493(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.827(2)
_cell_length_b                   21.647(4)
_cell_length_c                   11.075(2)
_cell_measurement_reflns_used    3334
_cell_measurement_temperature    293(1)
_cell_measurement_theta_max      21.79
_cell_measurement_theta_min      2.53
_cell_volume                     2080.8(7)
_computing_cell_refinement       'SAINT, Bruker Version 6.02A, 2000'
_computing_data_collection       'SMART, Bruker Version 5.624, 2001'
_computing_data_reduction        'XPREP, Bruker Version 5.1/NT, 2000'
_computing_molecular_graphics
;
PLUTO (Meetsma, 2001)
PLATON (Spek, 1994)
;
_computing_publication_material
;
PLATON (Spek, 1990)
SHELXL (Sheldrick, 1997)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution
;
SIR-97 (Altomare et al., 1997)
;
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean '4096x4096 / 62x62 (binned 512)'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type
;
Bruker Smart Apex
;
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_detector
;
CCD area-detector
;
_diffrn_radiation_monochromator  'parallel mounted graphite'
_diffrn_radiation_source         'fine focus sealed Siemens Mo tube '
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0379
_diffrn_reflns_av_sigmaI/netI    0.0446
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            14823
_diffrn_reflns_reduction_process
;
Intensity data were corrected for Lorentz and polarization
effects, decay and absorption and reduced to F~o~^2^
using SAINT (Bruker, 2000) and SADABS (Sheldrick, 2001)
;
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         2.53
_exptl_absorpt_coefficient_mu    0.267
_exptl_absorpt_correction_T_max  0.9790
_exptl_absorpt_correction_T_min  0.8940
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS, Sheldrick, Bruker, 2000))'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.304
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             856
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.342
_refine_diff_density_min         -0.302
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     331
_refine_ls_number_reflns         3673
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0834
_refine_ls_R_factor_gt           0.0498
_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^)+(0.0598P)^2^+0.4521P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1179
_refine_ls_wR_factor_ref         0.1342
_reflns_number_gt                2408
_reflns_number_total             3673
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b402222j.txt
_cod_data_source_block           c27h20s2
_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.

'_exptl_absorpt_correction_type' value 'Multi-Scan' changed
to 'multi-scan' 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_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7150374
_vrn_publ_code_void_volume       0.0
_vrn_publ_code_frame_time        20.0
_vrn_publ_code_meas_time         13.3