Scandium alkyl and amide complexes containing a cyclen-derived (NNNN) macrocyclic ligand: synthesis, structure and ring-opening polymerization activity toward lactide monomers.
Buffet, Jean-Charles; Okuda, Jun; Dalton transactions (Cambridge, England : 2003) 40 (2011) 7748–7754; doi:10.1039/c1dt10075k

data_7016038
_publ_section_title
;
 Scandium alkyl and amide complexes containing a cyclen-derived (NNNN)
 macrocyclic ligand: synthesis, structure and ring-opening
 polymerization activity toward lactide monomers.
;
_journal_issue                   30
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              7748
_journal_page_last               7754
_journal_paper_doi               10.1039/c1dt10075k
_journal_volume                  40
_journal_year                    2011
_chemical_formula_moiety         'C18 H48 N6 Sc Si4'
_chemical_formula_sum            'C18 H48 N6 Sc Si4'
_chemical_formula_weight         505.92
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                77.709(2)
_cell_angle_beta                 80.553(2)
_cell_angle_gamma                65.658(2)
_cell_formula_units_Z            2
_cell_length_a                   8.7601(9)
_cell_length_b                   9.3860(10)
_cell_length_c                   19.453(2)
_cell_measurement_reflns_used    7050
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.3
_cell_measurement_theta_min      1.1
_cell_volume                     1418.6(3)
_computing_cell_refinement       'Bruker SMART (2001)'
_computing_data_collection       'Bruker SMART (2001)'
_computing_data_reduction        'Bruker SAINT+ (1999)'
_computing_molecular_graphics    'ORTEP-III (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR-92 (Altomare 1992)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'APEX Area Detector'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  'multilayer optics'
_diffrn_radiation_source         'INCOATEC microsource'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1026
_diffrn_reflns_av_sigmaI/netI    0.1303
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            19685
_diffrn_reflns_theta_full        28.33
_diffrn_reflns_theta_max         28.33
_diffrn_reflns_theta_min         1.08
_exptl_absorpt_coefficient_mu    0.445
_exptl_absorpt_correction_T_max  0.9345
_exptl_absorpt_correction_T_min  0.6212
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.184
_exptl_crystal_density_meas      1.18
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             550
_exptl_crystal_size_max          0.47
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.26
_refine_diff_density_max         0.639
_refine_diff_density_min         -0.330
_refine_diff_density_rms         0.075
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.840
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     272
_refine_ls_number_reflns         7050
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.840
_refine_ls_R_factor_all          0.0747
_refine_ls_R_factor_gt           0.0474
_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^)+(0.0000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0926
_refine_ls_wR_factor_ref         0.1035
_reflns_number_gt                4550
_reflns_number_total             7050
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1dt10075k.txt
_cod_data_source_block           2
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7016038