Se 或 SeO2 在高濃度 KOh/CH30H 溶液中與 Cr(CO)6 加熱反應產生 [Se2Cr3(CO)10]2-，為一雙三角錐結構；但 TeO32- 則直接與Mo(CO)6 加熱反應產生 [Te2Mo4(CO)18]2-，具有 Te2Mo2 平面並以Te 原子連接兩個互為反向的 Mo(CO)5，為一開放型結構。
莫耳數比 1:1 的 EO32- (E=Te, Se) 與 Ru3(CO)12 在KOH/CH3OH 中反應可先形成三角錐結構的 [HERu3(CO)9]-，提高KOH 濃度或加熱，則產生八面體結構的[ERu5(CO)14]2-。[TeRu5(CO)14]2- 與 [Cu(CH3CN)4]BF4 反應產生 TeRu5(CO)14(Cu-NCCH3)2，其結構仍保留 [TeRu5(CO)14]2- 的架構，兩個[Cu-NCCH3]+ 外接於八面體的 Ru3 三角面上。
莫耳數比 1:1 的 SeO32- 與 Ru3(CO)12 加熱反應可得到[HSe2Ru4(CO)10]-，為一八面體結構，可利用 KOH 與之反應產生相同結構的 [Se2Ru4(CO)10]2-；若提高溫度及 Ru3(CO)12 的比例時，則產生一有趣的 [SeRU10(CO)24(O2CCH3)]-，其結構兩旁的[Se2Ru(CO)10]2- 分別接在中間的兩個 Ru 原子上，並以兩個CO及一個雙牙基的 CH3COO 將兩個 Ru 原子橋接起來，Ru 原子之間具有金屬鍵。

The reaction of Se or SeO2 with Cr(CO)6 basic KOH/CH3OH solution at 70℃ produces [Se2Cr3(CO)1o]2-, which displays a trigonal bipyramidal core geometry. On the other hand, TeO32- can react directly with Mo(CO)6 at 70℃ to produce [Te2Mo4(CO)18]2, which contains a Te2Mo4 plane with two Te atoms bridging by two trans-Mo(CO)5 groups.
The reaction of EO32- (E=Te, Se) with 1 equiv of Ru3)CO)12/KOH in CH3OH produces [HERu3(CO)9]-, which is proposed to bear a trigonal pyramidal structure. By increasing the temperature or the concentration of KOH/CH3OH, the reactions form the polynuclear octahedral anion clusters [ERu5(CO)14]2-. In addition, [TeRu5(CO)14]2- can further react with [Cu(CH3CN)4]BF4 to produce a mixed-metal ruthenium-copper cluster TeRu5(CO)14(Cu-NCCH3)2, which retains the skeleton of [TeRu5(CO)14]2- with two capping [Cu(NCCH3)]+ groups on two adjacent Ru3 triangular faces.
When SeO32- is treated with 1 equiv of Ru3(CO)12 in CH3OH at 70℃, [HSe2Ru4(CO)10]- is obtained. [HSe2Ru4(CO)10]- can be readily deprotonated to give [Se2Ru4(CO)10]2-. Interestingly, the reaction of SeO32- with 4/3 equiv of Ru3(CO)12 at 80℃ produces a novel high- nuclearity cluster ion [Se4Ru1o(CO)24(O2CCH3)]3-. This trianion can be viewed as two [Se2RU4(CO)10]2- octahedral clusters linking by two Ru(Ⅰ) atoms, which are bridged by two CO groups and one CH3COO moiety.