过渡元素(transition elements)是元素周期表中从ⅢB族到VⅢ族的化学元素 。这些元素在原子结构上的共同特点是价电子依次充填在次外层的d 轨道上 ，因此，有时人们也把镧系元素和锕系元素包括在过渡元素之中 。另外，ⅠB族元素(铜、银、金)在形成+2和 +3 价化合物时也使用了d电子；ⅡB族元素(锌、镉、汞)在形成稳定配位化合物的能力上与传统的过渡元素相似，因此，也常把ⅠB和ⅡB族元素列入过渡元素之中。
Tetrakis(triphenylphosphine)palladium
Bis(triphenylphosphine)nickel(II)chloride
Diacetato[(R)-(+)-2,2'-bis(diphenylphosphino)-1,1'-binaphthyl]ruthenium(II)
Ferroceneboronic acid
Bis(triphenylphosphine)palladium(II) acetate
Bis(acetonitrile)palladium(II) dichloride
1,2-Bis(diphenylphosphino)ethane nickel(II) chloride
Manganese(II) disodium 2,2',2'',2'''-(ethane-1,2-diylbis(azanetriyl))tetraacetate
Di-μ-hydroxo-bis[(N,N,N'.N'-tetramethylethylenediamine)copper(II)] chloride
Iron(III) acetylacetonate
Ferrocenylacetic acid
Bis(norbornadiene)rhodium (I) tetrafluoroborate
[Ir(dtbbpy)(ppy)2]PF6
1,1'-Bis(diphenylphosphino)ferrocene-palladium(II)dichloride dichloromethane complex
1,3-Bis(diphenylphosphino)propane nickel(II)chloride
Bis(hexafluoroacetylacetonato)nickel(II)
Gold(III) oxide
Hexaamminecobalt(iii)chloride
Hydridotetrakis(triphenylphosphine)rhodium(I)
Tris(dibenzylideneacetone)dipalladium(0)
21H,23H-Porphine, 5,10,15,20-tetraphenyl-, iron complex
Tris(2,2'-bipyridine)ruthenium bis(hexafluorophosphate)
Iron(II) phthalocyanine
Manganese(II) sulfate hydrate
(R,R)-(-)-N,N'-Bis(3,5-di-tertbutylsalicylidene)-1,2- cyclohexanediaminomanganese(III) chloride
Dichlorobis(tri-o-tolylphosphine)palladium(II)
Bis[1,2-bis(diphenylphosphino)ethane]palladium(0)
[1,3-Bis(diphenylphosphino)propane]palladium(II) dichloride
Ethynylferrocene
