Synthesis and structural characterisation of new ansa-bis(propene)s and {ansa-bis(allyl)}alkali metal and {ansa-bis(allyl)}transition metal complexes
Fernández-Galán, Rafael; Hitchcock, Peter B.; Lappert, Michael F.; Antiñolo, Antonio; Rodríguez, Ana M.; Journal of the Chemical Society, Dalton Transactions  (2000) 1743–; doi:10.1039/b000451k

data_7009375
_publ_section_title
;
 Synthesis and structural characterisation of new ansa-bis(propene)s
 and {ansa-bis(allyl)}alkali metal and {ansa-bis(allyl)}transition
 metal complexes
;
_journal_issue                   11
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              1743
_journal_paper_doi               10.1039/b000451k
_journal_year                    2000
_chemical_formula_structural     '[SiMe2{CHCHCH(SiMe3)Li(tmeda)}2]'
_chemical_formula_sum            'C26 H62 Li2 N4 Si3'
_chemical_formula_weight         528.95
_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
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 99.78(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.496(6)
_cell_length_b                   13.420(7)
_cell_length_c                   16.247(6)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      10
_cell_measurement_theta_min      7
_cell_volume                     3759(3)
_computing_cell_refinement       'Enraf-Nonius CAD4'
_computing_data_collection       'Enraf-Nonius CAD4'
_computing_molecular_graphics    'CAMERON (Watkin and Pearce,1993)'
_computing_publication_material  SHELXL-93
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measurement_device       ' Enraf-Nonius CAD4'
_diffrn_measurement_method       \w--2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0721
_diffrn_reflns_av_sigmaI/netI    0.1363
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            3397
_diffrn_reflns_theta_max         24.97
_diffrn_reflns_theta_min         2.19
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  120
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    0.144
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    0.935
_exptl_crystal_F_000             1176
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.482
_refine_diff_density_min         -0.271
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.023
_refine_ls_goodness_of_fit_obs   1.150
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     171
_refine_ls_number_reflns         3292
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.024
_refine_ls_restrained_S_obs      1.150
_refine_ls_R_factor_all          0.1909
_refine_ls_R_factor_obs          0.0899
_refine_ls_shift/esd_max         -0.001
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1184P)^2^+4.8934P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.2726
_refine_ls_wR_factor_obs         0.2103
_reflns_number_observed          1591
_reflns_number_total             3293
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            b000451k.txt
_cod_data_source_block           apr498
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.1184P)^2^+4.8934P] 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^)+(0.1184P)^2^+4.8934P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        3759.3(27)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7009375