Reactions of Terminal Alkynes with a Bulky Dialkylaluminum Hydride: Hydroalumination versus Deprotonation
Uhl, Werner; Er, Elif; Hepp, Alexander; Kösters, Jutta; Grunenberg, Jörg; Organometallics 27 (2008) 3346–; doi:10.1021/om800190f

data_4071493
_publ_section_title
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 Reactions of Terminal Alkynes with a Bulky Dialkylaluminum Hydride:
 Hydroalumination versus Deprotonation
;
_journal_issue                   14
_journal_name_full               Organometallics
_journal_page_first              3346
_journal_paper_doi               10.1021/om800190f
_journal_volume                  27
_journal_year                    2008
_chemical_formula_sum            'C20 H49 Al Si4'
_chemical_formula_weight         428.93
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 101.9500(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.0479(2)
_cell_length_b                   12.8181(2)
_cell_length_c                   23.5244(4)
_cell_measurement_reflns_used    'all measured'
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      72.01
_cell_measurement_theta_min      3.84
_cell_volume                     2964.16(9)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_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      153(2)
_diffrn_measured_fraction_theta_full 0.959
_diffrn_measured_fraction_theta_max 0.959
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0415
_diffrn_reflns_av_sigmaI/netI    0.0423
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            17274
_diffrn_reflns_theta_full        72.66
_diffrn_reflns_theta_max         72.66
_diffrn_reflns_theta_min         3.84
_exptl_absorpt_coefficient_mu    2.150
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.396
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    0.961
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plates
_exptl_crystal_F_000             952
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.483
_refine_diff_density_min         -0.355
_refine_diff_density_rms         0.062
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.086
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     241
_refine_ls_number_reflns         5648
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.0534
_refine_ls_R_factor_gt           0.0445
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0782P)^2^+0.2599P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1242
_refine_ls_wR_factor_ref         0.1309
_reflns_number_gt                4659
_reflns_number_total             5648
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om800190f-file001.cif
_cod_data_source_block           sad
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_hydrogen_treatment' value 'constr.' was replaced with the
value 'constr' as specified in the replacement file
'src/cod-tools/trunk/data/replacement-values/replacement_values.lst'.

Automatic conversion script
Id: cif_fix_values 5376 2017-05-30 11:51:03Z andrius 
;
_cod_original_sg_symbol_H-M      '-P 2yn'
_cod_database_code               4071493