SHIE-MING PENGLin, Tien SungTien SungLinCHUN-HSIEN CHENCheng, Ming ChuanMing ChuanChengLin, Geng MinGeng MinLin2023-08-042023-08-042023-01-019783527833306https://scholars.lib.ntu.edu.tw/handle/123456789/634434This chapter presents the beautiful nature of the helical architecture of metal-string complexes that build a ladder in the form of a spiral staircase. The recent developments of extended metal-atom chains (EMACs) from homonuclear to heteronuclear metal-string complexes (HMSCs) in the aspects of syntheses, crystallography, multinuclear metal–metal bonds, magnetism, and computer modeling will be reviewed. The new generation of metal-string complexes is supported by the designed ligands of naphthyl groups that are crucial because of the upgrade of the chain length and single-molecule conductance. Studies extending from single molecules to coordination polymers (CPs), the potentially conductive materials that are the building blocks of metal-string complexes, are reviewed and collectively presented. In addition, the preparations of known enantiopure metal-string complexes from their stereoisomers are summarized. Finally, an overview of the conductance of these complexes is reviewed as they possess excellent single-molecule conductance and have developed as the new emerging nanomaterials.enCoordination ladder polymer | Extended metal‐atom chains (EMACs) | Heteronuclear metal‐string complexes (HMSCs) | Metal‐string complexes | Metal‐string stereoisomers | Metal–metal bond | Molecular wire | Single‐molecular conductance[SDGs]SDG11book part10.1002/9783527833306.ch132-s2.0-85164858165https://api.elsevier.com/content/abstract/scopus_id/85164858165