The use of tariff codes to identify goods is not confined to customs laws. Excise, VAT or. GST laws and regulations also commonly refer to tariff headings to determine the tax. treatment of specific categories of goods. Income tax laws may as well, although more. rarely.
Allyl as a functional group is represented as-CH 2 -CH=CH 2. Allyl is considered to be a common name. The term allyl deals with a carbon attached to a carbon in a double bond (that is sp2 hybridized).This is not to be confused with allylic as allylic refers to just a carbon attached to the carbon in the double bond, not the entire group of three carbons.he vinyl group is similar to the allyl group. However, vinyl refers to a group attached directly to an sp 2 hybridized (double bonded) carbon. The vinyl group is represented as-CH=CH 2. This is not to be confused with vinyllic carbons which are only the carbons participating in the double bond, not the entire group.
Hydrocarbon Double Bond. The way to tell is to count the number of carbons and the number of hydrogens attached to each. Remember that carbon is tetravalent. If it has a separate bond with each other element, there would be no double bonds. So, C3H8 would NOT have a double bond. Imagine 3 carbons in a row. The C on the left hand side has one bond to the next carbon, and three others - in this case, bonds to hydrogen. The middle carbon has a bond to the C on its left and a bond to the C on its right. So, it could bond to 2 hydrogens. The C on the left hand side has one bond to the C in the middle, and three bonds to hydrogen.