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Table 2 29Si Chemical shifts (δ) of grafted neat and depolymerizied organosiloxane species at SiO2 surface

From: A 29Si, 1H, and 13C Solid-State NMR Study on the Surface Species of Various Depolymerized Organosiloxanes at Silica Surface

Species δ, ppm
Si(OH)2(O–)2 − 91
Si(OH)(O–)3 − 100
Si(O–)4 − 109
Si(CH3)(H)(O–) − 35
(≡SiO)2SiR, R-attached polymer chain − 58
(≡SiO)3SiR, R-attached polymer chain − 68
Si(CH3)(R)(O–)2 in D4, R = CH3, C2H4C6H8 − 19.5
Si(CH3)(O–)2 in linear MD4M − 23
Si(CH3)2(O–)2, D1 − 21
Si(CH3)(C2H4C6H8), D2 − 23