# Electronic Supplementary Material (ESI) for Polymer Chemistry.
# This journal is © The Royal Society of Chemistry 2018

####################################################################### 
# 
# This file contains crystal structure data downloaded from the 
# Cambridge Structural Database (CSD) hosted by the Cambridge 
# Crystallographic Data Centre (CCDC).
# 
# Full information about CCDC data access policies and citation 
# guidelines are available at http://www.ccdc.cam.ac.uk/access/V1 
# 
# Audit and citation data items may have been added by the CCDC. 
# Please retain this information to preserve the provenance of 
# this file and to allow appropriate attribution of the data. 
# 
#######################################################################

data_lb-1
_database_code_depnum_ccdc_archive 'CCDC 1867257'
_audit_update_record             
;
2018-09-12 deposited with the CCDC.
2018-11-07 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-97
_chemical_name_systematic        
; 
 ? 
;
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         ?
_chemical_formula_sum            'C27 H36 N Sc Si2'
_chemical_formula_weight         475.71

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'
Si Si 0.0817 0.0704 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Sc Sc 0.2519 0.3716 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_symmetry_cell_setting           Orthorhombic
_symmetry_space_group_name_H-M   P2(1)2(1)2(1)

loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x+1/2, -y, z+1/2'
'-x, y+1/2, -z+1/2'
'x+1/2, -y+1/2, -z'

_cell_length_a                   10.2990(10)
_cell_length_b                   15.4938(16)
_cell_length_c                   17.3672(17)
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_volume                     2771.3(5)
_cell_formula_units_Z            4
_cell_measurement_temperature    193(2)
_cell_measurement_reflns_used    1243
_cell_measurement_theta_min      2.30
_cell_measurement_theta_max      16.81

_exptl_crystal_description       block
_exptl_crystal_colour            yellow
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.15
_exptl_crystal_density_meas      ?
_exptl_crystal_density_diffrn    1.140
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1016
_exptl_absorpt_coefficient_mu    0.366
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_correction_T_min  0.9305
_exptl_absorpt_correction_T_max  0.9472
_exptl_absorpt_process_details   ?

_exptl_special_details           
; 
 ? 
;

_diffrn_ambient_temperature      193(2)
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_type           MoK\a
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_monochromator  graphite
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_detector_area_resol_mean ?
_diffrn_standards_number         ?
_diffrn_standards_interval_count ?
_diffrn_standards_interval_time  ?
_diffrn_standards_decay_%        ?
_diffrn_reflns_number            16726
_diffrn_reflns_av_R_equivalents  0.1151
_diffrn_reflns_av_sigmaI/netI    0.1669
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_theta_min         1.76
_diffrn_reflns_theta_max         28.30
_reflns_number_total             6459
_reflns_number_gt                3558
_reflns_threshold_expression     >2sigma(I)

_computing_data_collection       ?
_computing_cell_refinement       ?
_computing_data_reduction        ?
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_molecular_graphics    ?
_computing_publication_material  ?

_refine_special_details          
; 
 Refinement of F² against ALL reflections.  The weighted R-factor wR and 
 goodness of fit S are based on F², conventional R-factors R are based 
 on F, with F set to zero for negative F². The threshold expression of 
 F² > 2sigma(F²) is used only for calculating R-factors(gt) etc. and is 
 not relevant to the choice of reflections for refinement.  R-factors based 
 on F² are statistically about twice as large as those based on F, and R- 
 factors based on ALL data will be even larger. 
;

_refine_ls_structure_factor_coef Fsqd
_refine_ls_matrix_type           full
_refine_ls_weighting_scheme      calc
_refine_ls_weighting_details     
'calc w=1/[σ²(Fo²)+(0.0392P)²+0.0000P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_atom_sites_solution_hydrogens   geom
_refine_ls_hydrogen_treatment    constr
_refine_ls_extinction_method     none
_refine_ls_extinction_coef       ?
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.93(6)
_refine_ls_number_reflns         6459
_refine_ls_number_parameters     286
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.1635
_refine_ls_R_factor_gt           0.0854
_refine_ls_wR_factor_ref         0.1450
_refine_ls_wR_factor_gt          0.1198
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_restrained_S_all      1.034
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000

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
_atom_site_disorder_assembly
_atom_site_disorder_group
Sc1 Sc 0.14856(9) 0.21008(6) 0.20437(5) 0.0289(2) Uani 1 1 d . . .
N1 N 0.0091(4) 0.1239(3) 0.1398(2) 0.0310(11) Uani 1 1 d . . .
Si1 Si -0.14988(15) 0.31309(10) 0.26731(8) 0.0356(4) Uani 1 1 d . . .
Si2 Si 0.28608(17) 0.16437(13) 0.38655(9) 0.0519(5) Uani 1 1 d . . .
C1 C 0.1826(5) 0.2311(3) 0.0657(3) 0.0295(14) Uani 1 1 d . . .
C2 C 0.1984(5) 0.3155(4) 0.0962(3) 0.0328(13) Uani 1 1 d . . .
C3 C 0.3116(5) 0.3176(4) 0.1448(3) 0.0324(13) Uani 1 1 d . . .
C4 C 0.3714(5) 0.2342(4) 0.1399(3) 0.0328(14) Uani 1 1 d . . .
C5 C 0.2931(5) 0.1822(4) 0.0900(3) 0.0332(13) Uani 1 1 d . . .
C6 C 0.0707(5) 0.1959(4) 0.0205(3) 0.0428(16) Uani 1 1 d . . .
H6A H 0.1035 0.1710 -0.0269 0.051 Uiso 1 1 calc R . .
H6B H 0.0134 0.2432 0.0068 0.051 Uiso 1 1 calc R . .
C7 C -0.0070(5) 0.1283(4) 0.0625(3) 0.0298(13) Uani 1 1 d . . .
C8 C -0.0897(5) 0.0731(4) 0.0246(3) 0.0379(15) Uani 1 1 d . . .
H8 H -0.0985 0.0769 -0.0286 0.045 Uiso 1 1 calc R . .
C9 C -0.1593(6) 0.0125(4) 0.0649(3) 0.0407(14) Uani 1 1 d . . .
H9 H -0.2165 -0.0242 0.0394 0.049 Uiso 1 1 calc R . .
C10 C -0.1433(5) 0.0067(4) 0.1435(3) 0.0374(13) Uani 1 1 d . . .
H10 H -0.1887 -0.0340 0.1723 0.045 Uiso 1 1 calc R . .
C11 C -0.0584(5) 0.0628(3) 0.1782(3) 0.0336(14) Uani 1 1 d . . .
H11 H -0.0467 0.0585 0.2311 0.040 Uiso 1 1 calc R . .
C12 C 0.0276(4) 0.3041(4) 0.2658(3) 0.0366(14) Uani 1 1 d . . .
H12A H 0.0530 0.2992 0.3194 0.044 Uiso 1 1 calc R . .
H12B H 0.0583 0.3601 0.2488 0.044 Uiso 1 1 calc R . .
C13 C -0.2114(5) 0.3315(5) 0.1677(3) 0.067(2) Uani 1 1 d . . .
H13A H -0.1652 0.3789 0.1448 0.100 Uiso 1 1 calc R . .
H13B H -0.3024 0.3449 0.1695 0.100 Uiso 1 1 calc R . .
H13C H -0.1982 0.2804 0.1374 0.100 Uiso 1 1 calc R . .
C14 C -0.2218(5) 0.2129(4) 0.3079(3) 0.0527(16) Uani 1 1 d . . .
H14A H -0.2119 0.1666 0.2716 0.079 Uiso 1 1 calc R . .
H14B H -0.3124 0.2221 0.3180 0.079 Uiso 1 1 calc R . .
H14C H -0.1783 0.1983 0.3550 0.079 Uiso 1 1 calc R . .
C15 C -0.2134(6) 0.4023(4) 0.3271(4) 0.062(2) Uani 1 1 d . . .
H15A H -0.1834 0.3956 0.3791 0.094 Uiso 1 1 calc R . .
H15B H -0.3065 0.4013 0.3263 0.094 Uiso 1 1 calc R . .
H15C H -0.1831 0.4564 0.3070 0.094 Uiso 1 1 calc R . .
C16 C 0.2303(5) 0.1244(3) 0.2931(3) 0.0394(14) Uani 1 1 d . . .
H16A H 0.1652 0.0807 0.3036 0.047 Uiso 1 1 calc R . .
H16B H 0.3034 0.0949 0.2697 0.047 Uiso 1 1 calc R . .
C17 C 0.1458(7) 0.1694(5) 0.4557(3) 0.092(3) Uani 1 1 d . . .
H17A H 0.0756 0.2010 0.4327 0.138 Uiso 1 1 calc R . .
H17B H 0.1727 0.1979 0.5021 0.138 Uiso 1 1 calc R . .
H17C H 0.1174 0.1120 0.4677 0.138 Uiso 1 1 calc R . .
C18 C 0.3604(6) 0.2746(4) 0.3788(3) 0.070(2) Uani 1 1 d . . .
H18A H 0.4337 0.2725 0.3446 0.105 Uiso 1 1 calc R . .
H18B H 0.3884 0.2934 0.4288 0.105 Uiso 1 1 calc R . .
H18C H 0.2973 0.3144 0.3590 0.105 Uiso 1 1 calc R . .
C19 C 0.4123(7) 0.0942(5) 0.4318(4) 0.092(3) Uani 1 1 d . . .
H19A H 0.3789 0.0367 0.4373 0.138 Uiso 1 1 calc R . .
H19B H 0.4346 0.1167 0.4815 0.138 Uiso 1 1 calc R . .
H19C H 0.4882 0.0931 0.3997 0.138 Uiso 1 1 calc R . .
C20 C 0.1248(6) 0.3918(4) 0.0869(3) 0.0406(15) Uani 1 1 d . . .
H20 H 0.0504 0.3914 0.0565 0.049 Uiso 1 1 calc R . .
C21 C 0.1628(6) 0.4655(4) 0.1223(3) 0.0469(16) Uani 1 1 d . . .
H21 H 0.1139 0.5155 0.1160 0.056 Uiso 1 1 calc R . .
C22 C 0.2746(6) 0.4677(4) 0.1684(3) 0.0465(16) Uani 1 1 d . . .
H22 H 0.2992 0.5196 0.1910 0.056 Uiso 1 1 calc R . .
C23 C 0.3475(6) 0.3966(4) 0.1809(3) 0.0399(14) Uani 1 1 d . . .
H23 H 0.4202 0.3993 0.2126 0.048 Uiso 1 1 calc R . .
C24 C 0.4858(5) 0.1991(5) 0.1711(3) 0.0446(16) Uani 1 1 d . . .
H24 H 0.5372 0.2323 0.2038 0.054 Uiso 1 1 calc R . .
C25 C 0.5212(6) 0.1174(5) 0.1537(4) 0.0543(18) Uani 1 1 d . . .
H25 H 0.5978 0.0950 0.1739 0.065 Uiso 1 1 calc R . .
C26 C 0.4439(6) 0.0657(4) 0.1057(4) 0.0502(17) Uani 1 1 d . . .
H26 H 0.4703 0.0097 0.0946 0.060 Uiso 1 1 calc R . .
C27 C 0.3298(6) 0.0963(4) 0.0747(3) 0.0377(15) Uani 1 1 d . . .
H27 H 0.2780 0.0610 0.0442 0.045 Uiso 1 1 calc R . .


_geom_special_details            
; 
 All esds (except the esd in the dihedral angle between two l.s. planes) 
 are estimated using the full covariance matrix.  The cell esds are taken 
 into account individually in the estimation of esds in distances, angles 
 and torsion angles; correlations between esds in cell parameters are only 
 used when they are defined by crystal symmetry.  An approximate (isotropic) 
 treatment of cell esds is used for estimating esds involving l.s. planes. 
;

loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
_geom_bond_publ_flag
Sc1 C12 2.194(5) . ?
Sc1 C16 2.202(5) . ?
Sc1 N1 2.259(4) . ?
Sc1 C1 2.456(4) . ?
Sc1 C5 2.520(5) . ?
Sc1 C2 2.542(5) . ?
Sc1 C4 2.581(5) . ?
Sc1 C3 2.582(5) . ?
N1 C11 1.351(6) . ?
N1 C7 1.353(5) . ?
Si1 C12 1.833(5) . ?
Si1 C15 1.848(6) . ?
Si1 C14 1.858(5) . ?
Si1 C13 1.865(6) . ?
Si2 C16 1.829(5) . ?
Si2 C19 1.868(7) . ?
Si2 C18 1.877(6) . ?
Si2 C17 1.881(6) . ?
C1 C2 1.421(7) . ?
C1 C5 1.430(7) . ?
C1 C6 1.498(6) . ?
C2 C20 1.413(7) . ?
C2 C3 1.439(7) . ?
C3 C23 1.425(7) . ?
C3 C4 1.434(7) . ?
C4 C24 1.407(7) . ?
C4 C5 1.432(7) . ?
C5 C27 1.408(7) . ?
C6 C7 1.506(7) . ?
C7 C8 1.375(7) . ?
C8 C9 1.373(7) . ?
C9 C10 1.379(6) . ?
C10 C11 1.371(7) . ?
C20 C21 1.355(7) . ?
C21 C22 1.402(8) . ?
C22 C23 1.350(7) . ?
C24 C25 1.353(8) . ?
C25 C26 1.404(8) . ?
C26 C27 1.377(7) . ?

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
_geom_angle_publ_flag
C12 Sc1 C16 106.07(19) . . ?
C12 Sc1 N1 105.84(16) . . ?
C16 Sc1 N1 103.56(18) . . ?
C12 Sc1 C1 118.06(18) . . ?
C16 Sc1 C1 135.40(18) . . ?
N1 Sc1 C1 71.47(16) . . ?
C12 Sc1 C5 146.40(19) . . ?
C16 Sc1 C5 102.88(18) . . ?
N1 Sc1 C5 83.26(15) . . ?
C1 Sc1 C5 33.38(15) . . ?
C12 Sc1 C2 92.70(18) . . ?
C16 Sc1 C2 145.87(18) . . ?
N1 Sc1 C2 98.13(17) . . ?
C1 Sc1 C2 32.99(15) . . ?
C5 Sc1 C2 53.74(17) . . ?
C12 Sc1 C4 128.31(18) . . ?
C16 Sc1 C4 92.94(18) . . ?
N1 Sc1 C4 115.80(15) . . ?
C1 Sc1 C4 55.10(15) . . ?
C5 Sc1 C4 32.58(15) . . ?
C2 Sc1 C4 53.60(16) . . ?
C12 Sc1 C3 97.81(19) . . ?
C16 Sc1 C3 114.90(18) . . ?
N1 Sc1 C3 126.56(15) . . ?
C1 Sc1 C3 55.13(16) . . ?
C5 Sc1 C3 53.87(17) . . ?
C2 Sc1 C3 32.61(15) . . ?
C4 Sc1 C3 32.25(15) . . ?
C11 N1 C7 117.5(5) . . ?
C11 N1 Sc1 119.7(3) . . ?
C7 N1 Sc1 122.7(4) . . ?
C12 Si1 C15 114.7(3) . . ?
C12 Si1 C14 109.8(3) . . ?
C15 Si1 C14 105.7(3) . . ?
C12 Si1 C13 109.7(2) . . ?
C15 Si1 C13 106.7(3) . . ?
C14 Si1 C13 110.1(3) . . ?
C16 Si2 C19 113.2(3) . . ?
C16 Si2 C18 111.9(2) . . ?
C19 Si2 C18 106.0(3) . . ?
C16 Si2 C17 109.8(3) . . ?
C19 Si2 C17 106.9(3) . . ?
C18 Si2 C17 108.7(3) . . ?
C2 C1 C5 106.7(4) . . ?
C2 C1 C6 128.2(5) . . ?
C5 C1 C6 125.0(5) . . ?
C2 C1 Sc1 76.8(3) . . ?
C5 C1 Sc1 75.8(3) . . ?
C6 C1 Sc1 110.8(3) . . ?
C20 C2 C1 131.7(5) . . ?
C20 C2 C3 118.9(5) . . ?
C1 C2 C3 109.3(5) . . ?
C20 C2 Sc1 121.0(3) . . ?
C1 C2 Sc1 70.2(3) . . ?
C3 C2 Sc1 75.2(3) . . ?
C23 C3 C4 133.6(5) . . ?
C23 C3 C2 119.2(5) . . ?
C4 C3 C2 107.1(5) . . ?
C23 C3 Sc1 123.2(3) . . ?
C4 C3 Sc1 73.8(3) . . ?
C2 C3 Sc1 72.2(3) . . ?
C24 C4 C5 119.2(5) . . ?
C24 C4 C3 133.2(5) . . ?
C5 C4 C3 107.6(4) . . ?
C24 C4 Sc1 121.4(3) . . ?
C5 C4 Sc1 71.4(3) . . ?
C3 C4 Sc1 73.9(3) . . ?
C27 C5 C1 131.2(5) . . ?
C27 C5 C4 119.6(5) . . ?
C1 C5 C4 109.1(5) . . ?
C27 C5 Sc1 118.0(3) . . ?
C1 C5 Sc1 70.8(3) . . ?
C4 C5 Sc1 76.1(3) . . ?
C1 C6 C7 114.1(4) . . ?
N1 C7 C8 121.3(5) . . ?
N1 C7 C6 116.8(5) . . ?
C8 C7 C6 121.9(5) . . ?
C9 C8 C7 120.3(5) . . ?
C8 C9 C10 119.1(5) . . ?
C11 C10 C9 118.0(5) . . ?
N1 C11 C10 123.7(5) . . ?
Si1 C12 Sc1 128.6(3) . . ?
Si2 C16 Sc1 122.5(3) . . ?
C21 C20 C2 119.8(5) . . ?
C20 C21 C22 121.1(6) . . ?
C23 C22 C21 121.9(6) . . ?
C22 C23 C3 119.0(5) . . ?
C25 C24 C4 120.1(6) . . ?
C24 C25 C26 120.9(6) . . ?
C27 C26 C25 121.3(6) . . ?
C26 C27 C5 118.8(6) . . ?

_diffrn_measured_fraction_theta_max 0.970
_diffrn_reflns_theta_full        28.30
_diffrn_measured_fraction_theta_full 0.970
_refine_diff_density_max         0.316
_refine_diff_density_min         -0.292
_refine_diff_density_rms         0.067
