290 2222, 01, the two and the formal oxi- ased by 2. Many rded been isolated tha

Question

290 2222, 01, the two and the formal oxi- ased by 2. Many rded been isolated that contai dation num nd, first s inopropyt. CH CH of the main group, the coordinased be protonic or hydridic depending on the electron character of the metal atom, the nature of the other ligands, Elec- awing co ligands in the coordination the H atom proto nic, and compounds such as CoHIco), are strong Bramated acids. As with some main group hydrides, H atom can also occupy a bridging position bond) between rwo metal atoms, usually in conjunction with a metal metal bond. The complex HlWilco) ple of an H atom bridging two atoms that are eptic complex is a complex that contains only type of ligand. Examples of bomoleptic hydrido metal es are provided by Fe, Rh, and Te, The dark Mg FeHe, which contains the octahedral IFe anion, obtained by reacting the elements together under CO 8) is formed by red perrhenate, Reo, with Kor Na in ethanol. In the solid state H atoms form a tricapped trigonal prism around the Re, w is formally in the oxidation state +7. The TcHE complex has Both Hatoms and H, molecules may be coordinated as ligands to the same The (12) con- tains six H atoms in the inner coordination of ligand, H and Ha can be d molecule can also coordinate. intact, using the lo orbital to donate an electron pair and the lo orbital to ac cepr an electron pair back from the metal, in what is known as x-back donation or synergic bonding (Section 22.7), If the metal a sufficiently low oxidation state the homolytic cleavage of the H-H bond and the two Hatoms are formally reduced to H with concomi. of the metal. This process is known as oxidative 12 Ruth

Explanation / Answer

Hydride complexes contain a metal-hydrogen bond. The hydride ligand itself need not be hydridic in nature, but can in fact vary in nature from acidic to hydridic depending on the nature of the metal enter to which it is attached. Species can have up to several hydride ligands; even [ReH9]2- is known. The hydride ligand is considered to be an anionic ligand.

Hydrides can be made through a variety of methods:such as

Dihydrogen complexes are coordination complexes containing intact H2 as a ligand. The prototypical complex is W(CO)3(PCy3)2(H2). This class of compounds represent intermediates in metal-catalyzed reactions involving hydrogen. Hundreds of dihydrogen complexes have been reported.

Many metal hydrides can be protonated to give dihydrogen complexes.

LnMH + H+ [LnM(H2)]+

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.