Triisopropyl-(5-(4-nitrophenyl)tetrahydrofuran-3-ylidenemethyl)silane
Hursthouse, Michael B.; Light, Mark E.; Crystal Structure Report Archive  (2001) 123–; doi:

data_1519304
_publ_section_title
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 Triisopropyl-(5-(4-nitrophenyl)tetrahydrofuran-3-ylidenemethyl)silane
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_journal_name_full               'Crystal Structure Report Archive'
_journal_page_first              123
_journal_year                    2001
_chemical_formula_sum            'C20 H31 N O3 Si'
_chemical_formula_weight         361.55
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 91.066(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   14.6339(3)
_cell_length_b                   7.74630(10)
_cell_length_c                   35.8752(7)
_cell_measurement_reflns_used    13230
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      26.02
_cell_measurement_theta_min      2.91
_cell_volume                     4066.06(13)
_computing_cell_refinement
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, 1998)'
_computing_data_collection       'COLLECT (Hooft, 1998)'
_computing_data_reduction
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.863
_diffrn_measured_fraction_theta_max 0.863
_diffrn_measurement_device_type  'Bruker-Nonius KappaCCD'
_diffrn_measurement_method       '\F & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1029
_diffrn_reflns_av_sigmaI/netI    0.1814
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       42
_diffrn_reflns_limit_l_min       -42
_diffrn_reflns_number            6912
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         2.98
_exptl_absorpt_coefficient_mu    0.133
_exptl_absorpt_correction_T_max  0.9921
_exptl_absorpt_correction_T_min  0.9803
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SORTAV (Blessing, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.181
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1568
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.741
_refine_diff_density_min         -0.578
_refine_diff_density_rms         0.092
_refine_ls_extinction_coef       0.0000(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.968
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         3107
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.968
_refine_ls_R_factor_all          0.2006
_refine_ls_R_factor_gt           0.0824
_refine_ls_shift/su_max          0.480
_refine_ls_shift/su_mean         0.007
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1300P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1954
_refine_ls_wR_factor_ref         0.2539
_reflns_number_gt                1445
_reflns_number_total             3107
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            eCrystal-123.cif
_cod_data_source_block           01sot097
_cod_depositor_comments
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Citation :
Hursthouse, Michael B. and Light, Mark E. (2001) 
University of Southampton, Crystal Structure Report Archive. 
(doi:10.5258/ecrystals/123)

More at:
http://ecrystals.chem.soton.ac.uk/123/

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 3105 2015-03-04 15:46:00Z robertas 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               1519304