About
The character 羰 (tāng) is a modern chemical coinage created to represent the carbonyl group. Its structure logically combines the upper part of the character for oxygen, 氧 (yǎng), the sheep radical 羊 (yáng), with the full character for carbon, 炭 (tàn). This fusion visually merges oxygen and carbon to depict the carbon-oxygen double bond. By synthesizing these element characters directly, it forms a specialized term that precisely reflects molecular composition, bypassing traditional phonetic components.