The lack of a plane of symmetry makes the carbon chiral. The presence of a single chiral carbon atom sufficient to render the molecule chiral, and modern terminology refers to such groupings as chiral centers or stereo centers. An example is shown in the bromochlorofluoromethane molecule shown in part (a) of the figure below.

手性碳原子，英文名称chiral carbon atom，是指与四个各不相同原子或基团相连的碳原子，用C*表示。 所有含一个手性碳原子的化合物，都有一对对映异构体。 含有两个不相同的手性碳原子的化合物有4个旋光异构体（两对对映异构体）。 随着分子中含有的不相同手性碳原子数目的进一步增加，光学异构体的数目也会增多，含有n个不同手性碳原子的分子理论上具有旋光异构体的数目为2 n 个， 对映异构体 为2 n-1 对。 若两个手性碳原子上含有一个相同的原子或基团，习惯上也常 …

Carbon #2 is a chiral center: it has four bonds to other atoms and is tetrahedral, and each of the four things attached to it is different: a hydrogen, a methyl (-CH 3) group, an ethyl (-CH 2 CH 3) group, and a hydroxyl (OH) group. If we put carbon 2 in the center of a 3-dimensional drawing and lay out the 4 groups around it, we can investigate ...

Molecules that cannot be superimposed on their own mirror image are said to be chiral; as the asymmetric carbon is the center of this chirality, it is also known as a chiral carbon. As an example, malic acid (HOOC−CH2−CH (OH)−COOH) …

2017年6月23日 · Identification of chiral carbon explains whether a molecule is chiral or achiral. The determination of the number of chiral carbons present in a molecule is the key to indicate the number of stereoisomers it can have.

The lack of a plane of symmetry makes the carbon chiral. The presence of a single chiral carbon atom sufficient to render the molecule chiral, and modern terminology refers to such groupings as chiral centers or stereo centers. An example is shown in the bromochlorofluoromethane molecule shown in part (a) of the figure below.

Most chiral organic molecules have at least one carbon atom that is bonded to four different groups, as occurs in the bromochlorofluoromethane molecule shown in part (a) in Figure \(\PageIndex{2}\). This carbon, often designated by an asterisk in structural drawings, is called a chiral center or asymmetric carbon atom.

2022年7月20日 · Carbon #2 is a chiral center: it is sp3 -hybridized and tetrahedral (even though it is not drawn that way above), and the four things attached to is are different: a hydrogen, a methyl (-CH 3) group, an ethyl (-CH 2 CH 3) group, and a hydroxyl (OH) group.

2024年11月21日 · Any atom in an organic molecule that is bonded to four different types of atoms or chains of atoms can be considered "chiral". If a carbon atom (or other type of atom) has four different substituents, that carbon atom forms a chiral center (also known as a stereocenter). Chiral molecules often have one or more stereocenters.

Un tel atome de carbone est habituellement appelé « carbone asymétrique ». La présence d'un tel atome de carbone dans une molécule la rend chirale. Il existe toutefois des exceptions à cette règle, pour les molécules contenant plus d'un carbone asymétrique (composés méso, voir …