#------------------------------------------------------------------------------
#$Date: 2016-03-23 20:24:42 +0200 (Wed, 23 Mar 2016) $
#$Revision: 179410 $
#$URL: svn://www.crystallography.net/cod/cif/4/33/07/4330796.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_4330796
loop_
_publ_author_name
'Weixu Feng'
'Yao Zhang'
'Zhao Zhang'
'Xingqiang Lü'
'Han Liu'
'Guoxiang Shi'
'Dan Zou'
'Jirong Song'
'Daidi Fan'
'Wai-Kwok Wong'
'Richard A. Jones'
_publ_contact_author_address
;
Shaanxi Key Engineering Center of Bio-materials
Shaanxi Key Laboratory of Physico-inorganic Chemistry
Northwest University
Xi'an 
710069
China
;
_publ_contact_author_email       lvxq@nwu.edu.cn
_publ_contact_author_name        'Xingqiang Lu'
_publ_section_title
;
 Anion-Induced Self-Assembly of Luminescent and Magnetic Homoleptic Cyclic
 Tetranuclear Ln4(Salen)4 and Ln4(Salen)2 Complexes (Ln = Nd, Yb, Er, or
 Gd)
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              11377
_journal_page_last               11386
_journal_paper_doi               10.1021/ic300918c
_journal_volume                  51
_journal_year                    2012
_chemical_formula_sum            'C56 H68 Er4 N4 O22'
_chemical_formula_weight         1818.18
_chemical_name_systematic
; 
 ? 
;
_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                104.693(5)
_cell_angle_beta                 91.462(5)
_cell_angle_gamma                95.205(5)
_cell_formula_units_Z            1
_cell_length_a                   11.824(3)
_cell_length_b                   12.126(3)
_cell_length_c                   12.717(3)
_cell_measurement_reflns_used    1425
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      21.43
_cell_measurement_theta_min      2.46
_cell_volume                     1754.2(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.959
_diffrn_measured_fraction_theta_max 0.959
_diffrn_measurement_device_type  'Bruker Smart CCD'
_diffrn_measurement_method       'φ and ω scans'
_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  0.0519
_diffrn_reflns_av_sigmaI/netI    0.1306
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            9404
_diffrn_reflns_theta_full        26.24
_diffrn_reflns_theta_max         26.24
_diffrn_reflns_theta_min         1.66
_exptl_absorpt_coefficient_mu    4.804
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.721
_exptl_crystal_description       block
_exptl_crystal_F_000             880
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.21
_refine_diff_density_max         3.764
_refine_diff_density_min         -3.672
_refine_diff_density_rms         0.510
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     388
_refine_ls_number_reflns         6784
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.1414
_refine_ls_R_factor_gt           0.0832
_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/[σ²(Fo²)+(0.1474P)²+0.0000P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2157
_refine_ls_wR_factor_ref         0.2638
_reflns_number_gt                3949
_reflns_number_total             6784
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic300918c_si_002_4.cif
_cod_data_source_block           7
_cod_original_cell_volume        1754.3(8)
_cod_database_code               4330796
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x, -y, -z'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
Er1 Er 0.14300(7) 0.39262(7) 0.30313(6) 0.0356(3) Uani 1 1 d .
Er2 Er 0.05003(7) 0.64351(7) 0.48220(6) 0.0372(3) Uani 1 1 d .
C1 C 0.115(3) 0.921(2) 0.454(2) 0.094(10) Uani 1 1 d .
H1A H 0.1612 0.9680 0.4179 0.141 Uiso 1 1 calc R
H1B H 0.1310 0.9475 0.5312 0.141 Uiso 1 1 calc R
H1C H 0.0363 0.9256 0.4377 0.141 Uiso 1 1 calc R
C2 C 0.2196(16) 0.7757(17) 0.3371(16) 0.045(5) Uani 1 1 d .
C3 C 0.291(2) 0.859(2) 0.3112(19) 0.069(7) Uani 1 1 d .
H3A H 0.2905 0.9351 0.3487 0.083 Uiso 1 1 calc R
C4 C 0.368(2) 0.827(2) 0.226(2) 0.075(8) Uani 1 1 d .
H4A H 0.4140 0.8816 0.2024 0.091 Uiso 1 1 calc R
C5 C 0.3705(19) 0.7143(18) 0.1809(17) 0.053(5) Uani 1 1 d .
H5A H 0.4230 0.6916 0.1284 0.063 Uiso 1 1 calc R
C6 C 0.3002(16) 0.6315(17) 0.2079(16) 0.043(5) Uani 1 1 d .
C7 C 0.2236(14) 0.6657(17) 0.2935(15) 0.038(4) Uani 1 1 d .
C8 C 0.3148(17) 0.514(2) 0.1474(17) 0.054(6) Uani 1 1 d .
H8A H 0.3613 0.5055 0.0886 0.065 Uiso 1 1 calc R
C9 C 0.287(2) 0.307(2) 0.098(2) 0.068(7) Uani 1 1 d .
H9A H 0.2099 0.2694 0.0763 0.081 Uiso 1 1 calc R
C10 C 0.344(2) 0.303(2) -0.0103(19) 0.073(8) Uani 1 1 d .
H10A H 0.4202 0.3431 0.0031 0.088 Uiso 1 1 calc R
H10B H 0.3003 0.3387 -0.0557 0.088 Uiso 1 1 calc R
C11 C 0.349(3) 0.174(2) -0.066(2) 0.085(9) Uani 1 1 d .
H11A H 0.2733 0.1422 -0.0965 0.102 Uiso 1 1 calc R
H11B H 0.3980 0.1684 -0.1271 0.102 Uiso 1 1 calc R
C12 C 0.387(3) 0.101(2) -0.003(2) 0.128(16) Uani 1 1 d .
H12A H 0.3726 0.0217 -0.0457 0.154 Uiso 1 1 calc R
H12B H 0.4689 0.1172 0.0105 0.154 Uiso 1 1 calc R
C13 C 0.334(2) 0.1114(17) 0.1024(17) 0.065(7) Uani 1 1 d .
H13A H 0.3735 0.0695 0.1450 0.078 Uiso 1 1 calc R
H13B H 0.2555 0.0781 0.0899 0.078 Uiso 1 1 calc R
C14 C 0.338(2) 0.238(2) 0.1660(17) 0.075(8) Uani 1 1 d .
H14A H 0.4183 0.2673 0.1818 0.090 Uiso 1 1 calc R
C15 C 0.3273(18) 0.2122(17) 0.3410(16) 0.049(5) Uani 1 1 d .
H15A H 0.3910 0.1744 0.3191 0.059 Uiso 1 1 calc R
C16 C 0.2928(16) 0.2137(16) 0.4534(16) 0.042(5) Uani 1 1 d .
C17 C 0.3576(17) 0.1600(19) 0.5106(17) 0.055(6) Uani 1 1 d .
H17A H 0.4185 0.1240 0.4775 0.067 Uiso 1 1 calc R
C18 C 0.337(2) 0.157(2) 0.614(2) 0.072(7) Uani 1 1 d .
H18A H 0.3856 0.1226 0.6519 0.087 Uiso 1 1 calc R
C19 C 0.2462(19) 0.204(2) 0.6629(18) 0.074(8) Uani 1 1 d .
H19A H 0.2318 0.2021 0.7341 0.089 Uiso 1 1 calc R
C20 C 0.1754(18) 0.2535(19) 0.6050(18) 0.053(5) Uani 1 1 d .
C21 C 0.2007(16) 0.2647(17) 0.5026(15) 0.042(5) Uani 1 1 d .
C22 C 0.065(2) 0.317(2) 0.7640(17) 0.071(8) Uani 1 1 d .
H22A H 0.1299 0.2931 0.7967 0.107 Uiso 1 1 calc R
H22B H -0.0015 0.2676 0.7695 0.107 Uiso 1 1 calc R
H22C H 0.0551 0.3944 0.8012 0.107 Uiso 1 1 calc R
C23 C 0.309(2) 0.573(2) 0.488(2) 0.069(7) Uani 1 1 d .
C24 C 0.430(2) 0.649(3) 0.519(3) 0.18(2) Uani 1 1 d .
H24A H 0.4885 0.6075 0.4814 0.263 Uiso 1 1 calc R
H24B H 0.4460 0.6661 0.5960 0.263 Uiso 1 1 calc R
H24C H 0.4275 0.7197 0.4977 0.263 Uiso 1 1 calc R
C25 C -0.066(2) 0.385(2) 0.1313(17) 0.063(6) Uani 1 1 d .
C26 C -0.097(3) 0.380(5) 0.015(3) 0.24(3) Uani 1 1 d .
H26A H -0.0318 0.3649 -0.0275 0.364 Uiso 1 1 calc R
H26B H -0.1223 0.4516 0.0107 0.364 Uiso 1 1 calc R
H26C H -0.1570 0.3196 -0.0118 0.364 Uiso 1 1 calc R
C27 C -0.038(2) 0.1611(18) 0.2826(16) 0.060(6) Uani 1 1 d .
C28 C -0.077(3) 0.045(2) 0.221(2) 0.112(12) Uani 1 1 d .
H28A H -0.0389 0.0276 0.1536 0.168 Uiso 1 1 calc R
H28B H -0.1577 0.0400 0.2051 0.168 Uiso 1 1 calc R
H28C H -0.0611 -0.0077 0.2622 0.168 Uiso 1 1 calc R
N1 N 0.2708(15) 0.4209(15) 0.1668(13) 0.050(5) Uani 1 1 d .
N2 N 0.2824(14) 0.2547(14) 0.2718(13) 0.050(4) Uani 1 1 d .
O1 O 0.1406(13) 0.8036(12) 0.4167(13) 0.063(4) Uani 1 1 d .
O2 O 0.1484(11) 0.5893(11) 0.3187(10) 0.044(3) Uani 1 1 d .
O3 O 0.1313(11) 0.3208(12) 0.4577(11) 0.047(3) Uani 1 1 d .
O4 O 0.0844(12) 0.3093(14) 0.6486(11) 0.061(4) Uani 1 1 d .
O5 O -0.0129(10) 0.4593(11) 0.3936(10) 0.039(3) Uani 1 1 d .
O6 O 0.3010(12) 0.4807(13) 0.4166(12) 0.059(4) Uani 1 1 d .
O7 O 0.2283(12) 0.6244(16) 0.5349(12) 0.068(5) Uani 1 1 d .
O8 O 0.0345(12) 0.3977(13) 0.1525(11) 0.053(4) Uani 1 1 d .
O9 O -0.1410(15) 0.405(2) 0.2007(14) 0.097(7) Uani 1 1 d .
O10 O 0.0394(14) 0.2170(12) 0.2438(12) 0.061(4) Uani 1 1 d .
O11 O -0.0817(12) 0.2017(11) 0.3757(11) 0.055(4) Uani 1 1 d .
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
N N 0.0061 0.0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0106 0.0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Er Er -0.2586 4.9576 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
O5 Er1 O8 83.0(5) . .
O5 Er1 O10 88.1(5) . .
O8 Er1 O10 73.0(5) . .
O5 Er1 O6 106.0(5) . .
O8 Er1 O6 144.3(5) . .
O10 Er1 O6 140.2(5) . .
O5 Er1 O3 72.5(4) . .
O8 Er1 O3 140.2(5) . .
O10 Er1 O3 75.3(5) . .
O6 Er1 O3 74.0(5) . .
O5 Er1 O2 71.5(4) . .
O8 Er1 O2 77.9(5) . .
O10 Er1 O2 146.2(5) . .
O6 Er1 O2 72.9(5) . .
O3 Er1 O2 120.8(4) . .
O5 Er1 N1 143.5(5) . .
O8 Er1 N1 72.6(6) . .
O10 Er1 N1 109.5(6) . .
O6 Er1 N1 81.2(6) . .
O3 Er1 N1 141.9(5) . .
O2 Er1 N1 76.9(5) . .
O5 Er1 N2 148.5(5) . .
O8 Er1 N2 115.5(5) . .
O10 Er1 N2 74.8(6) . .
O6 Er1 N2 74.4(6) . .
O3 Er1 N2 77.7(5) . .
O2 Er1 N2 134.8(5) . .
N1 Er1 N2 68.0(5) . .
O5 Er1 Er2 38.2(3) . .
O8 Er1 Er2 96.6(4) . .
O10 Er1 Er2 126.2(4) . .
O6 Er1 Er2 74.2(4) . .
O3 Er1 Er2 83.3(3) . .
O2 Er1 Er2 41.0(3) . .
N1 Er1 Er2 117.3(4) . .
N2 Er1 Er2 146.7(4) . .
O5 Er1 Er2 36.1(3) . 2_566
O8 Er1 Er2 108.2(4) . 2_566
O10 Er1 Er2 72.0(4) . 2_566
O6 Er1 Er2 97.5(4) . 2_566
O3 Er1 Er2 37.9(3) . 2_566
O2 Er1 Er2 101.9(3) . 2_566
N1 Er1 Er2 178.4(5) . 2_566
N2 Er1 Er2 112.5(4) . 2_566
Er2 Er1 Er2 61.39(3) . 2_566
O7 Er2 O11 79.7(6) . 2_566
O7 Er2 O5 101.3(5) . .
O11 Er2 O5 156.7(5) 2_566 .
O7 Er2 O5 80.1(5) . 2_566
O11 Er2 O5 86.7(5) 2_566 2_566
O5 Er2 O5 70.7(5) . 2_566
O7 Er2 O3 144.5(5) . 2_566
O11 Er2 O3 76.0(5) 2_566 2_566
O5 Er2 O3 91.4(4) . 2_566
O5 Er2 O3 73.1(4) 2_566 2_566
O7 Er2 O2 74.4(5) . .
O11 Er2 O2 130.5(5) 2_566 .
O5 Er2 O2 71.0(4) . .
O5 Er2 O2 128.0(4) 2_566 .
O3 Er2 O2 140.9(5) 2_566 .
O7 Er2 O4 150.1(5) . 2_566
O11 Er2 O4 107.3(5) 2_566 2_566
O5 Er2 O4 83.5(5) . 2_566
O5 Er2 O4 128.5(5) 2_566 2_566
O3 Er2 O4 63.6(5) 2_566 2_566
O2 Er2 O4 79.5(4) . 2_566
O7 Er2 O1 84.3(6) . .
O11 Er2 O1 71.5(5) 2_566 .
O5 Er2 O1 131.8(5) . .
O5 Er2 O1 155.2(5) 2_566 .
O3 Er2 O1 111.5(5) 2_566 .
O2 Er2 O1 64.6(5) . .
O4 Er2 O1 71.2(6) 2_566 .
O7 Er2 Er1 71.2(4) . .
O11 Er2 Er1 151.0(4) 2_566 .
O5 Er2 Er1 38.6(3) . .
O5 Er2 Er1 89.0(3) 2_566 .
O3 Er2 Er1 129.7(3) 2_566 .
O2 Er2 Er1 40.1(3) . .
O4 Er2 Er1 97.7(4) 2_566 .
O1 Er2 Er1 104.2(3) . .
O7 Er2 Er1 109.2(4) . 2_566
O11 Er2 Er1 71.4(4) 2_566 2_566
O5 Er2 Er1 86.5(3) . 2_566
O5 Er2 Er1 36.5(3) 2_566 2_566
O3 Er2 Er1 38.1(3) 2_566 2_566
O2 Er2 Er1 157.4(3) . 2_566
O4 Er2 Er1 100.6(3) 2_566 2_566
O1 Er2 Er1 137.2(3) . 2_566
Er1 Er2 Er1 118.61(3) . 2_566
O7 Er2 Er2 90.9(5) . 2_566
O11 Er2 Er2 121.9(4) 2_566 2_566
O5 Er2 Er2 35.3(3) . 2_566
O5 Er2 Er2 35.4(3) 2_566 2_566
O3 Er2 Er2 80.6(3) 2_566 2_566
O2 Er2 Er2 100.2(3) . 2_566
O4 Er2 Er2 108.2(4) 2_566 2_566
O1 Er2 Er2 164.8(3) . 2_566
Er1 Er2 Er2 60.63(3) . 2_566
Er1 Er2 Er2 57.98(2) 2_566 2_566
C7 C2 C3 122.9(18) . .
C7 C2 O1 115.8(17) . .
C3 C2 O1 121.2(18) . .
C2 C3 C4 119(2) . .
C5 C4 C3 117(2) . .
C4 C5 C6 124(2) . .
C5 C6 C7 118.4(19) . .
C5 C6 C8 115.0(18) . .
C7 C6 C8 126.6(17) . .
O2 C7 C2 120.1(16) . .
O2 C7 C6 120.9(17) . .
C2 C7 C6 118.5(17) . .
N1 C8 C6 127.2(18) . .
N1 C9 C10 116.8(18) . .
N1 C9 C14 109(2) . .
C10 C9 C14 115(2) . .
C9 C10 C11 106(2) . .
C12 C11 C10 119(3) . .
C13 C12 C11 115(2) . .
C12 C13 C14 111(2) . .
N2 C14 C9 110.2(18) . .
N2 C14 C13 113(2) . .
C9 C14 C13 111(2) . .
N2 C15 C16 129.2(18) . .
C17 C16 C21 118.3(18) . .
C17 C16 C15 116.4(17) . .
C21 C16 C15 125.3(17) . .
C18 C17 C16 122.4(19) . .
C17 C18 C19 120(2) . .
C20 C19 C18 119(2) . .
O4 C20 C19 123.5(19) . .
O4 C20 C21 114.6(17) . .
C19 C20 C21 121(2) . .
O3 C21 C16 125.1(17) . .
O3 C21 C20 116.2(18) . .
C16 C21 C20 118.7(18) . .
O6 C23 O7 127(2) . .
O6 C23 C24 120(2) . .
O7 C23 C24 112(2) . .
O8 C25 O9 125(2) . .
O8 C25 C26 114(2) . .
O9 C25 C26 119(3) . .
O10 C27 O11 123.4(19) . .
O10 C27 C28 118(2) . .
O11 C27 C28 118(2) . .
C8 N1 C9 122.6(16) . .
C8 N1 Er1 130.1(14) . .
C9 N1 Er1 107.1(12) . .
C15 N2 C14 115.9(18) . .
C15 N2 Er1 127.0(14) . .
C14 N2 Er1 115.8(13) . .
C2 O1 C1 119.3(16) . .
C2 O1 Er2 116.4(11) . .
C1 O1 Er2 124.3(13) . .
C7 O2 Er1 133.7(11) . .
C7 O2 Er2 119.1(11) . .
Er1 O2 Er2 98.9(4) . .
C21 O3 Er2 123.5(11) . 2_566
C21 O3 Er1 132.4(11) . .
Er2 O3 Er1 103.9(5) 2_566 .
C20 O4 C22 116.9(15) . .
C20 O4 Er2 116.3(12) . 2_566
C22 O4 Er2 125.8(12) . 2_566
Er2 O5 Er2 109.3(5) . 2_566
Er2 O5 Er1 103.2(5) . .
Er2 O5 Er1 107.5(5) 2_566 .
C23 O6 Er1 127.7(14) . .
C23 O7 Er2 134.1(16) . .
C25 O8 Er1 133.2(14) . .
C27 O10 Er1 135.2(14) . .
C27 O11 Er2 137.6(14) . 2_566
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
Er1 O5 2.298(11) .
Er1 O8 2.296(14) .
Er1 O10 2.296(14) .
Er1 O6 2.330(15) .
Er1 O3 2.346(13) .
Er1 O2 2.338(13) .
Er1 N1 2.397(14) .
Er1 N2 2.422(16) .
Er1 Er2 3.5876(13) .
Er1 Er2 3.6875(13) 2_566
Er2 O7 2.245(15) .
Er2 O11 2.246(13) 2_566
Er2 O5 2.279(13) .
Er2 O5 2.276(12) 2_566
Er2 O3 2.335(12) 2_566
Er2 O2 2.383(11) .
Er2 O4 2.476(13) 2_566
Er2 O1 2.469(13) .
Er2 Er1 3.6875(13) 2_566
Er2 Er2 3.7147(19) 2_566
C1 O1 1.44(3) .
C2 C7 1.31(3) .
C2 C3 1.37(3) .
C2 O1 1.39(2) .
C3 C4 1.43(3) .
C4 C5 1.34(3) .
C5 C6 1.36(3) .
C6 C7 1.44(2) .
C6 C8 1.47(3) .
C7 O2 1.33(2) .
C8 N1 1.28(3) .
C9 N1 1.47(3) .
C9 C10 1.54(3) .
C9 C14 1.50(3) .
C10 C11 1.56(3) .
C11 C12 1.43(4) .
C12 C13 1.48(3) .
C13 C14 1.54(3) .
C14 N2 1.49(2) .
C15 N2 1.26(2) .
C15 C16 1.49(3) .
C16 C17 1.36(3) .
C16 C21 1.39(3) .
C17 C18 1.35(3) .
C18 C19 1.35(3) .
C19 C20 1.38(3) .
C20 O4 1.38(2) .
C20 C21 1.38(3) .
C21 O3 1.32(2) .
C22 O4 1.47(2) .
C23 O6 1.25(3) .
C23 O7 1.26(3) .
C23 C24 1.61(4) .
C25 O8 1.20(3) .
C25 O9 1.26(3) .
C25 C26 1.49(4) .
C27 O10 1.27(2) .
C27 O11 1.30(2) .
C27 C28 1.45(3) .
O3 Er2 2.335(12) 2_566
O4 Er2 2.476(13) 2_566
O5 Er2 2.276(12) 2_566
O11 Er2 2.246(13) 2_566
