It was later extended to conjugated molecules such as [[pyridine]], [[pyrole]] and [[furan]] that contain atoms other than carbon, known in this context as heteroatoms.

• 后来，休克尔方法被扩展到共轭分子，例如 [[嘧啶]]， [[pyrole]] 和 [[呋喃]] that contain atoms other than carbon； known in this context as heteroatoms.