What is the Vinylic position?

On a carbon skeleton, sp2-hybridized carbons or positions are often called vinylic. Allyls, acrylates and styrenics contain vinyl groups. (A styrenic crosslinker with two vinyl groups is called divinyl benzene.)

What is the allylic halide?

An allylic halide is the one where the carbon atom next to a double bonded carbon atom carries one or more halogen atoms. ( Carbon next to the double bonded carbon is known as an allylic carbon). Such halides are reactive in both Sn1 and Sn2 mechanisms.

What is allylic and benzylic?

Allylic and benzylic cations have delocalized electrons, so they are more stable than similarly substituted carbocations with localized electrons. An allylic cation is a carbocation with the positive charge on an allylic carbon; an allylic carbon is a carbon adjacent to an sp2 carbon of an alkene.

What is a vinylic position?

On a carbon skeleton, sp2-hybridized carbons or positions are often called vinylic. Allyls, acrylates and styrenics contain vinyl groups. (A styrenic crosslinker with two vinyl groups is called divinyl benzene.)

What are Aryls?

In the context of organic molecules, aryl is any functional group or substituent derived from an aromatic ring, usually an aromatic hydrocarbon, such as phenyl and naphthyl.

What is allyl and vinyl?

An allyl group is a substituent with the structural formula H2C=CH−CH2R, where R is the rest of the molecule. It consists of a methylene bridge (−CH2−) attached to a vinyl group (−CH=CH2). The name is derived from the Latin word for garlic, Allium sativum.

What does it mean to be allylic?

An allylic carbon is a carbon atom bonded to a carbon atom that in turn is doubly bonded to another carbon atom. eg: see also allylic hydrogen.

What is a record made of?

At first, the discs were commonly made from shellac; starting in the 1950s polyvinyl chloride became common. In recent decades, records have sometimes been called vinyl records, or simply vinyl. The phonograph disc record was the primary medium used for music reproduction throughout the 20th century.

What kind of material is vinyl?

Vinyl is not a natural substance but is a synthetic man-made material. It is a type of plastic that is made from ethylene (found in crude oil) and chlorine (found in regular salt). When processed, both the substances are combined to form Polyvinyl Chloride (PVC) resin, or as is commonly referred to – Vinyl.

What is a vinylic hydrogen?

Illustrated Glossary of Organic Chemistry – Vinylic hydrogen. Vinylic hydrogen: A hydrogen atom bonded to an sp2 carbon of an alkene. The vinylic hydrogens are shown in red. None of the other hydrogens are vinylic.

What is a vinyl cation?

The vinyl cation is a carbocation with the positive charge on an alkene carbon. Its empirical formula is C2H3+. More generally, a vinylic cation is any disubstituted, trivalent carbon, where the carbon bearing the positive charge is part of a double bond and is sp hybridized.

What is an allylic hydrogen?

An allylic hydrogen is a hydrogen atom that is bonded to an allylic carbon in an organic molecule.

What are vinyl protons?

A vinylic proton is a proton attached to a carbon in a double bond. So you will see a structure like this: H–C=C. An allylic methyl group will look like this: CH3–C–C=C.

What is an aryl group?

An aryl group is a functional group derived from a simple aromatic ring compound where one hydrogen atom is removed from the ring. Usually, the aromatic ring is a hydrocarbon. Examples: The phenyl functional group (C6H5) is an aryl functional group derived from benzene.

What is the benzylic position?

The term benzylic is used to describe the position of the first carbon bonded to a benzene or other aromatic ring. For example, the molecule, is referred to as a “benzylic” carbocation. The benzyl free radical has the formula C. 6H.

What was vinyl chloride used for?

Vinyl chloride is used primarily to make polyvinyl chloride (PVC); PVC is used to make a variety of plastic products, including pipes, wire and cable coatings, and packaging materials. Vinyl chloride is also produced as a combustion product in tobacco smoke.

What is a vinyl radical?

n a univalent chemical radical derived from ethylene. Synonyms: vinyl, vinyl group Type of: chemical group, group, radical. (chemistry) two or more atoms bound together as a single unit and forming part of a molecule.

What is a vinyl for music?

The answer lies in the difference between analog and digital recordings. A vinyl record is an analog recording, and CDs and DVDs are digital recordings. Take a look at the graph below. Original sound is analog by definition. A vinyl record has a groove carved into it that mirrors the original sound’s waveform.

What is meant by vinyl halide?

In organic chemistry, a vinyl halide is a compound with the formula CH2=CHX (X = halide). The term vinyl is often used to describe any alkenyl group. For this reason, alkenyl halides with the formula RCH=CHX are sometimes called vinyl halides.

Is vinyl expensive?

It’s not uncommon to see records in shops hovering around $40 – not for rare used vinyl, but for new releases. A few years back, new vinyl cost $25 to $30. “Making vinyl is expensive, there’s no question,” Durlak says.

What is vinyl format?

1948. Extended to. Present. The LP (from “long playing” or “long play”) is an analog sound storage medium, a vinyl record format characterized by a speed of ?33 1⁄3 rpm, a 12- or 10-inch (30 or 25 cm) diameter, and use of the “microgroove” groove specification.

How many minutes can you fit on a 7 inch?

Standard Vinyl can press both types of 7 inch records: 45 rpm (with about 4.5 minutes per side) and 33 rpm (with about 7 minutes per side).

What are 78 rpm records made out of?

The materials of which discs were made and with which they were coated were also various; shellac eventually became the commonest material. Generally 78s are made of a brittle material which uses a shellac resin (thus their other name is shellac records).