Origin of SMM behaviour in an asymmetric Er(III) Schiff base complex: a combined experimental and theoretical study
Das, Chinmoy; Upadhyay, Apoorva; Vaidya, Shefali; Singh, Saurabh Kumar; Rajaraman, Gopalan; Shanmugam, Maheswaran; Chemical Communications (Cambridge, United Kingdom) 51 (2015) 6137–6140; doi:10.1039/c4cc09523e

data_7116869
_publ_section_title
;
 Origin of SMM behaviour in an asymmetric Er(III) Schiff base complex:
 a combined experimental and theoretical study
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   28
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              6137
_journal_page_last               6140
_journal_paper_doi               10.1039/c4cc09523e
_journal_volume                  51
_journal_year                    2015
_chemical_formula_sum            'C28 H26 Lu N5 O13'
_chemical_formula_weight         815.51
_space_group_IT_number           41
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'A 2 -2ab'
_symmetry_space_group_name_H-M   'A b a 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2015-02-06 deposited with the CCDC.
2015-02-14 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            12
_cell_length_a                   17.439(3)
_cell_length_b                   54.451(11)
_cell_length_c                   9.5702(19)
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.12
_cell_measurement_theta_min      3.07
_cell_volume                     9088(3)
_computing_cell_refinement
;
CrystalClear-SM Expert 2.1 b24 (Rigaku, 2012)
;
_computing_data_collection
;
CrystalClear-SM Expert 2.1 b24 (Rigaku, 2012)
;
_computing_data_reduction
;
CrystalClear-SM Expert 2.1 b24 (Rigaku, 2012)
;
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type
;
Rigaku Saturn724+ (4x4 bin mode)
;
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0566
_diffrn_reflns_av_sigmaI/netI    0.0497
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       73
_diffrn_reflns_limit_k_min       -74
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            55796
_diffrn_reflns_theta_full        29.12
_diffrn_reflns_theta_max         29.12
_diffrn_reflns_theta_min         3.07
_exptl_absorpt_coefficient_mu    3.335
_exptl_absorpt_correction_T_max  0.5551
_exptl_absorpt_correction_T_min  0.5551
_exptl_absorpt_correction_type   numerical
_exptl_crystal_colour            'orange red'
_exptl_crystal_density_diffrn    1.788
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             4848
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.185
_refine_diff_density_min         -2.024
_refine_diff_density_rms         0.103
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.011(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.077
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     748
_refine_ls_number_reflns         12162
_refine_ls_number_restraints     211
_refine_ls_restrained_S_all      1.079
_refine_ls_R_factor_all          0.0511
_refine_ls_R_factor_gt           0.0446
_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^)+(0.0141P)^2^+38.6801P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0777
_refine_ls_wR_factor_ref         0.0807
_reflns_number_gt                10958
_reflns_number_total             12162
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4cc09523e2.cif
_cod_data_source_block           shelxl
_cod_original_sg_symbol_H-M      Aba2
_cod_database_code               7116869