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- Crystal data for 6 at 150 K: C37H66N4Si3, MW = 651.21, Triclinic, space group P-1, a = 8.4799(3) Å, b = 12.7150(5) Å, c = 18.5396(7) Å, α = 99.648(3), β = 91.221(3), γ = 98.838(3), V = 1945.03(13) Å3, Z = 2, Dcalc = 1.112 g cm−3. R = 0.0532 (I >2σ(I)), wR (all data) = 0.1528. GOF = 1.039. CCDC-1419674.
- NMR data of 6: 1H NMR (200 MHz, C6D6, 298 K): δ [ppm] = 0.33 (s, 9 H, Si(CH3)3), 1.13 (s, 3 H, C = C-CH3), 1.29 (s, 27 H, Si(C(CH3)3)), 1.55 (s, 6 H, C = C-CH3), 1.81 (s, 3 H, C = C-CH3), 2.68–3.17 (br, 6 H, N-CH3), 3.09 (d, 2JHH = 3 Hz, 1 H, Si-CH-Si(CH3)3), 3. 33 (s, 3 H, N-CH3), 3.80 (d, 2JHH = 15 Hz, 1 H, CH2), 4.25 (d, 2JHH = 15 Hz, 1 H, CH2), 5.02 (d, 2JHH = 3 Hz, 1JSiH-satellite = 162 Hz, 1 H, Si-H), 6.74 – 7.43 (m, 5 H, Ph-H). 13C{1H} NMR (100.61 MHz, C6D6, 298 K) δ; [ppm] = 3.7 (Si-CH-Si), 4.2 (Si(CH3)3), 8.8, 8.9, 9.0, 9.3 (CH3-C = C-CH3), 24.4 (C(CH3)3), 32.4 (C(CH3)3), 34.3, 32.0 (N-CH3), 35.1 (N-CH2-Si), 74.6 (C = C(Ph)), 117.7 (C = CN2), 122.5, 123.3, 123.9 (CH3-C = C-CH3), 129.3, 146.9, 151.7, (C-Ph), 210.7 (:CN2). 29Si{1H} NMR (79.49 MHz, C6D6, 298 K): δ [ppm] = −32.5 (Si-H), 7.4 (SiMe3), 11.5 (SitBu3). HR MS (APCI): m/z (%) = Calcd. for C37H67N4Si4O 667.4617 (1, [M+OH]+), found 667.4611.