首先是过渡金属羰基化合物和主族元素形成的一系列具有奇妙的成键的分子配合物,但这部分只能被基质分离等方式观测到:
[1] C. Chi, S. Pan, L. Meng, M. Luo, L. Zhao, M. Zhou, G. Frenking, ““Alkali Metal Covalent Bonding in Nickel Carbonyl Complexes ENi(CO)3−,”” Angewandte Chemie 2019, 131, 1746–1752.
[2] B. Ju, Z. Zhang, X. Kong, J. Zou, G. Li, H. Xie, L. Jiang, ““Photoelectron velocity map imaging spectroscopy of group 14 elements and iron tetracarbonyl anionic clusters MFe(CO)4− (M = Si, Ge, Sn),”” The Journal of Chemical Physics 2024, 160, 044307.
[3] H. Xie, J. Zou, Q. Yuan, H. Fan, Z. Tang, L. Jiang, ““Photoelectron velocity-map imaging and theoretical studies of heteronuclear metal carbonyls M Ni(CO)3− ( M = Mg, Ca, Al),”” The Journal of Chemical Physics 2016, 144, 124303.
[4] J. Wang, C. Chi, H. Hu, L. Meng, M. Luo, J. Li, M. Zhou, ““Triple Bonds Between Iron and Heavier Group 15 Elements in AFe(CO)3− (A=As, Sb, Bi) Complexes,”” Angew Chem Int Ed 2018, 57, 542–546.
[5] J.-Q. Wang, C. Chi, J.-B. Lu, L. Meng, M. Luo, H.-S. Hu, M. Zhou, J. Li, ““Triple bonds between iron and heavier group-14 elements in the AFe(CO)3− complexes (A = Ge, Sn, and Pb),”” Chem. Commun. 2019, 55, 5685–5688.
[6] C. Chi, J.-Q. Wang, H.-S. Hu, Y.-Y. Zhang, W.-L. Li, L. Meng, M. Luo, M. Zhou, J. Li, ““Quadruple bonding between iron and boron in the BFe(CO)3− complex,”” Nat Commun 2019, 10, 4713.
[7] G. Wang, J. Zhao, H. Hu, J. Li, M. Zhou, ““Formation and Characterization of BeFe(CO)4− Anion with Beryllium−Iron Bonding,”” Angewandte Chemie 2021, 133, 9420–9424.
[8] J. Wang, C. Chi, H. Hu, X. Li, M. Luo, J. Li, M. Zhou, ““Multiple Bonding Between Group 3 Metals and Fe(CO)3−,”” Angew Chem Int Ed 2020, 59, 2344–2348.