Synthesis, stereochemistry, and photochemical and thermal behaviour of bis-tert-butyl substituted overcrowded alkenes.
Ter Wiel, Matthijs K. J.; Kwit, Marcin G.; Meetsma, Auke; Feringa, Ben L.; Organic & biomolecular chemistry 5 (2007) 87–96; doi:10.1039/b611070c

data_7151039
_publ_section_title
;
 Synthesis, stereochemistry, and photochemical and thermal behaviour of
 bis-tert-butyl substituted overcrowded alkenes.
;
_journal_issue                   1
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              87
_journal_page_last               96
_journal_paper_doi               10.1039/b611070c
_journal_volume                  5
_journal_year                    2007
_chemical_compound_source        'see text'
_chemical_formula_moiety         'C34 H36'
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_space_group_IT_number           19
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_symmetry_Int_Tables_number      19
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   direct
_audit_creation_date             '2004-03-15 15:50:15'
_audit_creation_method
;
PLATON <TABLE ACC> option
SHELXL97-2 & Manual Editing
;
_audit_update_record
;
?
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.7582(6)
_cell_length_b                   14.4454(8)
_cell_length_c                   17.915(1)
_cell_measurement_reflns_used    5568
_cell_measurement_temperature    100(1)
_cell_measurement_theta_max      26.84
_cell_measurement_theta_min      2.27
_cell_volume                     2525.3(3)
_computing_cell_refinement       'SAINTPLUS, Version 6.02A, (Bruker, 2000)'
_computing_data_collection       'SMART, Version 5.624, (Bruker, 2001)'
_computing_data_reduction        'XPREP, Version 5.1/NT, (Bruker, 2000)'
_computing_molecular_graphics
;
PLUTO (Meetsma, 2003)
PLATON (Spek, 1994)
;
_computing_publication_material  'PLATON (Spek, 1990)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution
;
SIR-97 (Altomare et al., 1999)
;
_diffrn_ambient_temperature      100(1)
_diffrn_detector_area_resol_mean '4096x4096 / 62x62 (binned 512)'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0239
_diffrn_reflns_av_sigmaI/netI    0.0295
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -18
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_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        25.00
_diffrn_reflns_theta_max         26.02
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_exptl_absorpt_coefficient_mu    0.065
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_exptl_absorpt_correction_T_min  0.8992
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_exptl_absorpt_process_details   '(SADABS, Sheldrick, Bruker, 2001))'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.169
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             960
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.31
_refine_diff_density_max         0.177
_refine_diff_density_min         -0.147
_refine_diff_density_rms         0.029
_refine_ls_abs_structure_details
;
Absolute structure cannot be determined reliably;
there are only elements in the structure with very small
anomalous effects by the used X-ray wavelength
;
_refine_ls_abs_structure_Flack   0(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     451
_refine_ls_number_reflns         4973
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.0396
_refine_ls_R_factor_gt           0.0341
_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^)+(0.0537P)^2^+0.0P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0818
_refine_ls_wR_factor_ref         0.0838
_reflns_number_gt                4419
_reflns_number_total             4973
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b611070c.txt
_cod_data_source_block           CP886
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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_database_code               7151039
_vrn_publ_code_squeezed_elec     0.0
_vrn_publ_code_void_volume       0.0
_vrn_publ_code_frame_time_sec    10.0
_vrn_publ_code_meas_time_hour    5.8