Thymine

C₅H₆N₂O₂

IUPAC: 5-Methylpyrimidine-2,4(1H,3H)-dione

CAS: 65-71-4

Übersicht

Thymine is a pyrimidine nucleobase found exclusively in DNA, where it pairs with adenine through two hydrogen bonds. It is distinguished from uracil (found in RNA) by having a methyl group at the 5 position. This methylation helps DNA repair enzymes distinguish DNA from RNA.

Zusammensetzung

Element Symbol Atome Atommasse
Hydrogen H 6 1,0080
Carbon C 5 12,0110
Nitrogen N 2 14,0070
Oxygen O 2 15,9990

Elementare Zusammensetzung

H
Hydrogen ×6
4,8%
C
Carbon ×5
47,6%
N
Nitrogen ×2
22,2%
O
Oxygen ×2
25,4%

Verwendung

  • • DNA component
  • • Genetic research
  • • Molecular biology
  • • UV mutation studies

Wissenswertes

  • ✦ UV light can cause adjacent thymine bases to fuse into thymine dimers, a primary cause of skin cancer

Sicherheit

  • ⚠ Low toxicity

Structure

SMILES

CC1=CNC(=O)NC1=O

Eigenschaften

Typ
organic
Zustand
solid
Molmasse
126,12 g/mol
Dichte
1,2230 g/cm³
Schmelzpunkt
316,0 °C
Siedepunkt
335,0 °C
Löslichkeit
4.0 g/L at 25°C

Molecular Descriptors

Exact Mass
126,0429
XLogP
-0,6
TPSA
58,2 Ų
H-Bond Donors
2
H-Bond Acceptors
2
Rotatable Bonds
0
Heavy Atoms
9
Complexity
195,0

Auch bekannt als

5-Methyluracil

Verwandte Verbindungen

Caffeine

C₈H₁₀N₄O₂

Coumarin

C₉H₆O₂

Acetone

(CH₃)₂CO

Acrylic Acid

C₃H₄O₂

Cysteine

C₃H₇NO₂S

DDT

C₁₄H₉Cl₅

Alanine

C₃H₇NO₂

Diazepam

C₁₆H₁₃ClN₂O

Dichloromethane

CH₂Cl₂

Butane

C₄H₁₀

Frequently Asked Questions

What is Thymine?
Thymine (C₅H₆N₂O₂) is a organic compound with the IUPAC name 5-Methylpyrimidine-2,4(1H,3H)-dione.
What is the molecular weight of Thymine?
Thymine has a molar mass of 126.115 g/mol.
What state is Thymine at room temperature?
Thymine is a solid at room temperature.
Is Thymine organic or inorganic?
Thymine is classified as an organic compound.
What elements make up Thymine?
Thymine (C₅H₆N₂O₂) is composed of Hydrogen (H), Carbon (C), Nitrogen (N), Oxygen (O).