From CO2to Polysiloxanes: Di(carbamoyloxy)silanes Me2Si[(OCO)NRR′]2as Precursors for PDMS
Kraushaar, Konstantin; Wiltzsch, Conny; Wagler, Jörg; Böhme, Uwe; Schwarzer, Anke; Roewer, Gerhard; Kroke, Edwin; Organometallics 31 (2012) 4779–; doi:10.1021/om300313f

data_4078672
_publ_section_title
;
 From CO2to Polysiloxanes: Di(carbamoyloxy)silanes
 Me2Si[(OCO)NRR&#x2032;]2as Precursors for PDMS
;
_journal_issue                   13
_journal_name_full               Organometallics
_journal_page_first              4779
_journal_paper_doi               10.1021/om300313f
_journal_volume                  31
_journal_year                    2012
_chemical_formula_moiety         'C8 H18 N2 O4 Si'
_chemical_formula_sum            'C8 H18 N2 O4 Si'
_chemical_formula_weight         234.33
_chemical_name_systematic
; 
 dimethylsilanediyl bis(ethylcarbamate) 
;
_space_group_IT_number           59
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ab 2a'
_symmetry_space_group_name_H-M   'P m m n :2'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   16.3210(9)
_cell_length_b                   7.1980(4)
_cell_length_c                   5.0130(2)
_cell_measurement_reflns_used    10617
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      25.75
_cell_measurement_theta_min      2.50
_cell_volume                     588.92(5)
_computing_cell_refinement       'STOE X-AREA'
_computing_data_collection       'STOE X-AREA'
_computing_data_reduction        'STOE X-RED'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      153(2)
_diffrn_detector                 'image plate (34 cm diameter)'
_diffrn_detector_area_resol_mean 6.67
_diffrn_detector_type            STOE
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_details      ' 355 frames, detector distance = 110 mm'
_diffrn_measurement_device       '2-circle goniometer'
_diffrn_measurement_device_type  'STOE IPDS 2'
_diffrn_measurement_method       'rotation method'
_diffrn_radiation_collimation    '0.5 mm diameter, monocapillary'
_diffrn_radiation_monochromator  'plane graphite'
_diffrn_radiation_polarisn_norm  0
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0721
_diffrn_reflns_av_sigmaI/netI    0.0277
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            7266
_diffrn_reflns_theta_full        25.49
_diffrn_reflns_theta_max         25.49
_diffrn_reflns_theta_min         2.50
_diffrn_source
'sealed X-ray tube, 12 x 0.4 mm long-fine focus'
_diffrn_source_current           40
_diffrn_source_power             2.00
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    0.198
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.321
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             252
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.207
_refine_diff_density_min         -0.247
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     52
_refine_ls_number_reflns         612
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.048
_refine_ls_R_factor_all          0.0303
_refine_ls_R_factor_gt           0.0277
_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/[\s^2^(Fo^2^)+(0.0415P)^2^+0.2513P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0759
_refine_ls_wR_factor_ref         0.0784
_reflns_number_gt                565
_reflns_number_total             612
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om300313f_si_002.cif
_cod_data_source_block           kk46_02
_cod_original_sg_symbol_H-M      'P m m n'
_cod_database_code               4078672