Alkaline-Earth Metal Alkylaluminate Chemistry Revisited
Michel, Olaf; Meermann, Christian; Törnroos, Karl W.; Anwander, Reiner; Organometallics 28 (2009) 4783–; doi:10.1021/om900342h

data_4069660
_publ_section_title
;
 Alkaline-Earth Metal Alkylaluminate Chemistry Revisited
;
_journal_issue                   16
_journal_name_full               Organometallics
_journal_page_first              4783
_journal_paper_doi               10.1021/om900342h
_journal_volume                  28
_journal_year                    2009
_chemical_formula_moiety         'C12 H28 Mg2 O2'
_chemical_formula_sum            'C12 H28 Mg2 O2'
_chemical_formula_weight         252.96
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-I 2ya'
_symmetry_space_group_name_H-M   'I 1 2/a 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                 114.142(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.9530(6)
_cell_length_b                   10.0259(5)
_cell_length_c                   13.5302(6)
_cell_measurement_reflns_used    10645
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      30.61
_cell_measurement_theta_min      2.617
_cell_volume                     1603.42(13)
_computing_cell_refinement
;
Bruker (2004). SAINT, version 6.45a, Bruker AXS Inc., Madison, 
Wisconsin, USA.
;
_computing_data_collection
;
Bruker (1999). SMART, version 5.054, Bruker AXS Inc., Madison, 
Wisconsin, USA.
;
_computing_data_reduction
;
Bruker (2004). SAINT, version 6.45a, Bruker AXS Inc., Madison, 
Wisconsin, USA.
;
_computing_molecular_graphics
;
Brandenburg, K. (2007). DIAMOND. Version 3.1. Crystal Impact GbR, Bonn, 
Germany.
;
_computing_publication_material
;
Bruker AXS (2003). SHELXTL. Version 6.14. Bruker AXS Inc., Madison, 
Wisconsin, USA.
;
_computing_structure_refinement
;
Sheldrick, G. M. (2008). Acta Crystallographica, A64, 112-122.
;
_computing_structure_solution
;     
Sheldrick, G. M. (2008). Acta Crystallographica, A64, 112-122.
;
_diffrn_ambient_temperature      123(2)
_diffrn_detector_area_resol_mean '48 \um'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker-AXS SMART 2K CCD'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0145
_diffrn_reflns_av_sigmaI/netI    0.0099
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            13750
_diffrn_reflns_theta_full        30.62
_diffrn_reflns_theta_max         30.62
_diffrn_reflns_theta_min         2.62
_exptl_absorpt_coefficient_mu    0.137
_exptl_absorpt_correction_T_max  0.9797
_exptl_absorpt_correction_T_min  0.9408
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS version 2008/1, G.M Sheldrick, University of 
G\"ttingen, Germany, 1996. 
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.048
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'irregular prism'
_exptl_crystal_F_000             560
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.455
_refine_diff_density_min         -0.549
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.140
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     84
_refine_ls_number_reflns         2485
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.139
_refine_ls_R_factor_all          0.0544
_refine_ls_R_factor_gt           0.0495
_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^)+(0.0716P)^2^+1.5058P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1462
_refine_ls_wR_factor_ref         0.1504
_reflns_number_gt                2205
_reflns_number_total             2485
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            om900342h_si_001.cif
_cod_data_source_block           Compound7
_cod_original_sg_symbol_H-M      'I 2/a'
_cod_database_code               4069660