Isomerism of dimeric cis-ethene-1,2-di(alkylamido)gallium hydrides and chlorides
Schmidt, Eva Susanne; Jockisch, Alexander; Schmidbaur, Hubert; Journal of the Chemical Society, Dalton Transactions  (2000) 1039–; doi:10.1039/a909198j

data_7009189
_publ_section_title
;
 Isomerism of dimeric cis-ethene-1,2-di(alkylamido)gallium hydrides and
 chlorides
;
_journal_issue                   7
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              1039
_journal_paper_doi               10.1039/a909198j
_journal_year                    2000
_chemical_formula_sum            'C20 H42 Ga2 N4'
_chemical_formula_weight         478.02
_chemical_name_systematic
; 
 ? 
;
_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   'geom (CH), Difmap (GaH)'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 100.160(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.077(2)
_cell_length_b                   9.8180(10)
_cell_length_c                   12.304(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    143(2)
_cell_measurement_theta_max      16
_cell_measurement_theta_min      13
_cell_volume                     1198.2(3)
_computing_cell_refinement       'CAD4 Software (Enraf-Nonius 1989)'
_computing_data_collection       'CAD4 Software (Enraf-Nonius 1989)'
_computing_data_reduction        'Cadshel 3.1'
_computing_molecular_graphics    SHELXTL-PLUS
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      143(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Enraf-Nonius CAD4 '
_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  0.0259
_diffrn_reflns_av_sigmaI/netI    0.0356
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            4436
_diffrn_reflns_theta_full        26.94
_diffrn_reflns_theta_max         26.94
_diffrn_reflns_theta_min         2.41
_diffrn_standards_interval_time  3600s
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    2.259
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.325
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'transparent block '
_exptl_crystal_F_000             504
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.266
_refine_diff_density_min         -0.210
_refine_diff_density_rms         0.046
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    'riding (CH), isotropic (GaH)'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     243
_refine_ls_number_reflns         2580
_refine_ls_number_restraints     61
_refine_ls_restrained_S_all      1.079
_refine_ls_R_factor_all          0.0543
_refine_ls_R_factor_gt           0.0301
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0390P)^2^+0.2247P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0710
_refine_ls_wR_factor_ref         0.0770
_reflns_number_gt                1994
_reflns_number_total             2580
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            a909198j.txt
_cod_data_source_block           EVA6
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7009189