Synthesis and structures of tris(2-pyridyl)aluminate sandwich compounds [{RAl(2-py')2}2M] (py' = 2-pyridyl, M = Ca, Mn, Fe).
García-Rodríguez, Raúl; Bullock, Thomas H.; McPartlin, Mary; Wright, Dominic S.; Dalton transactions (Cambridge, England : 2003) 43 (2014) 14045–14053; doi:10.1039/c4dt00951g

data_7031963
_publ_section_title
;
 Synthesis and structures of tris(2-pyridyl)aluminate sandwich compounds
 [{RAl(2-py')2}2M] (py' = 2-pyridyl, M = Ca, Mn, Fe).
;
_journal_issue                   37
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              14045
_journal_page_last               14053
_journal_paper_doi               10.1039/c4dt00951g
_journal_volume                  43
_journal_year                    2014
_chemical_formula_moiety         'C38 H42 Al2 Ca N6'
_chemical_formula_sum            'C38 H42 Al2 Ca N6'
_chemical_formula_weight         676.82
_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
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 102.983(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.2800(8)
_cell_length_b                   10.297(1)
_cell_length_c                   18.271(2)
_cell_measurement_reflns_used    122487
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      32.03
_cell_measurement_theta_min      1.02
_cell_volume                     1884.6(3)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius B.V. 1998)'
_computing_data_reduction
;
 HKL Denzo and Scalepack (Otwinowski & Minor 1997)
;
_computing_publication_material  'SHELXL-97 (Sheldrick 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick 1997)'
_computing_structure_solution    'SIR-92 (Altomare et al. 1994)'
_diffrn_ambient_temperature      180(2)
_diffrn_measured_fraction_theta_full 0.817
_diffrn_measured_fraction_theta_max 0.817
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       'Thin slice \w and \f scans'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0306
_diffrn_reflns_av_sigmaI/netI    0.0500
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            9723
_diffrn_reflns_theta_full        32.25
_diffrn_reflns_theta_max         32.25
_diffrn_reflns_theta_min         3.58
_exptl_absorpt_coefficient_mu    0.247
_exptl_absorpt_correction_T_max  0.982
_exptl_absorpt_correction_T_min  0.887
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
multi-scan from symmetry-related measurements 
 Sortav (Blessing 1995)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.193
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             716
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.337
_refine_diff_density_min         -0.390
_refine_diff_density_rms         0.057
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.087
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     214
_refine_ls_number_reflns         5475
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.087
_refine_ls_R_factor_all          0.0774
_refine_ls_R_factor_gt           0.0508
_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^)+(0.0501P)^2^+0.9673P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1242
_refine_ls_wR_factor_ref         0.1382
_reflns_number_gt                4059
_reflns_number_total             5475
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4dt00951g2.cif
_cod_data_source_block           dw0861
_cod_depositor_comments
'Adding full bibliography for 7031958--7031967.cif.'
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7031963