The 1H-NMR spectrum of the compound 1 showed an oxymethylene
signal at I' 3.82 (2H, t, J = 7.0 Hz), one methylene signal at I' 1.15 as quintet (2H, J = 6.4, 7.1 Hz), one oxymethine signal at I' 2.05 (1H, m), and an envelope of methylene signals at I' 1.17-1.45 as a broad multiplet (58 H).
ethers (OM[E.sub.n], C[H.sub.3](OC[[H.sub.2]).sub.n]OC[H.sub.3]) [12, 13] are currently investigated to optimise PM emission behaviour of diesel combustion.
Viana, "The local thermomechanical conditions and the fracture behavior of an injection-molded poly(oxymethylene
)," Polymer Engineering and Science, vol.
The compound GB-25 has additional one oxymethylene
signal and a set of glucose signal compared to GB-24.
The [sup.1]H NMR spectrum exhibited a triplet oxymethylene
signal at [delta] 3.62, and its corresponding carbon signal was confirmed at [[delta].sub.C] 63.1.
Two oxymethine carbons peaked at 75.29 (C-9) and 74.80 (C-8) ppm and an oxymethylene
peak appeared up field at 60.17 (C-19) ppm (see Supporting File 33).
 studied the morphology and electrical conductivity of poly(oxymethylene
) (POM)/CNT nanocomposites prepared via [micro]IM.
The signal due to the oxymethylene
connected with tosylate was shifted to 4.05 ppm (2H, peak d), whereas the signal due to the oxymethylene
, which was connected to the hydroxide end group of PEG before substitution, was located at 3.80 ppm.
The [sup.1]H and [sup.13]C NMR spectroscopic data of Compound 1 showed the characteristic signals for an [alpha], [beta]-unsaturated carbonyl group [([[delta].sub.H] 7.57, 1H, br s, H-1; [[delta].sub.C] 160.7, C-1); [[delta].sub.C] 132.8, C-2; [[delta].sub.C] 208.8, C-3], a trisubstituted double bond [([[delta].sub.H] 5.66, 1H, d, 7 = 4.6 Hz, H-7; [[delta].sub.C] 129.2, C-7); [[delta].sub.C] 140.4, C-6], an oxymethine ([[delta].sub.H] 5.39, 1H, d, 7 = 10.1 Hz, H-12; [[delta].sub.C] 76.5, C-12), and an oxymethylene
[[[delta].sub.H] 4.01 and 4.00, AB 2H, 7 = 12.8 Hz, [H.sub.2]-20; [[delta].sub.C] 68.0, C-20] of a phorbol ester system [15,16].
(oxane) bridges between hydroxyls is termed formalization.
(1991, 1994) identified the formation of intermediate methoxide[CH[O.sub.3]], poly(oxymethylene
)[(C[H.sub.2]O)n], and dioxymethylene[[H.sub.2]C[O.sub.2]] over silver-cerium oxide and ruthenium-cerium oxide at room temperature.