allylic

As suitable modifiers triallyl cyanurate (TAC) with three allylic groups and divinylbenzene (DVB) with two vinyl groups were used to induce long-chain branching or crosslinking on PHB.

The prospect of an allylic resonance of the vinyl groups (OL 1170) with silicon d orbitals may play a role in its enhanced reactivity.

DORMAN & DEANS (2000) also detailed that an allylic side chain seem to enhance the inhibitory effects of the component, especially against Gram-negative bacteria and also compounds with isopropyl cyclohexane rings or unsaturation on the cyclohexane ring increase the antibacterial activity, such as sabinene.

The signals at 1.99 ppm and 2.73 ppm correspond to the allylic protons (-C[H.sub.2]-CH=CH-) and internal allylic protons (-CH=CH-C[H.sub.2]-CH=CH-), respectively.

The Baylis-Hillman (BH) reaction is an important carbon-carbon bond forming synthetic transformation that provides highly substituted allylic alcohols and amines in one step [12-16].

[54] concluded that at high temperatures this olefinic fuel reacts rapidly, similar to related alkane fuels, but the pronounced thermal stability of the allylic pentenyl species inhibits low-temperature reactivity; so 2-methyl-2-butene does not produce cool flames or negative temperature coefficient (NTC) behavior as shown in Figure 5.

Yamada, "A highly active and reusable self-assembled poly (imidazole/palladium) catalyst: allylic arylation/alkenylation," Angewandte Chemie International Edition, vol.

The modification of jojoba removes reactive allylic and bis allylic protons which causes oxidation reactions to occur.

In general, the hydrogen atoms of both the allylic and the bisallylic positions are the starting points for the oxidative degradation of biodiesel [14, 15].

Antioxidants are phenolic compounds which promote the removal or inactivation of free radicals produced, during the initiation and propagation reactions, through the donation of active hydrogen atoms which are removed by free radical more easily than the allylic protons of unsaturated molecules.