1,721,232 research outputs found
Synthesis of carbonyl halides of late transition elements in thionyl chloride as solvent. A convenient synthesis of cis-dicarbonyldichloroplatinum(II)
No full textREDOX REACTIONS OF METAL-CARBONYLS OF GROUP-5A
No full textRedox reactions of V(CO)6w ith [Co(CO)4]-, [Mn(CO)5]-, [M2(C0),012-,o r [M(T~-C~H~) (C(OM) =~ ]C-r , Mo, W), or
C O ( ~ ~ - Co~ccHur~ ra)p~id ly at 25 "C and lower in hydrocarbons; on the other hand, V(C0)s is oxidized to
V(T-~-C~H~)(CbOy )M, n(q5-C5H5)o* r N i ( ~ f - c ~ Han~d )th~e two-electron oxidation of [Nb(CO)6]- to the
[Nb2X3(C0)8]a- nion (X = CI, Br, I, acetylacetonato), can be carried out using a number of oxidizing agents
(Hgll, Cull, Cul, Agl, or Fell')
Complex anionic metal sulfides and process for their preparation
No full textTransition metal complex sulfides contg. the NH2R2+ group are prepd. by treating with H2S an anhyd. org. soln. of a carbamate Mz(O2CNR2)z, where M is a transition metal and R is an alkyl group. Semiconductors are prepd. (NH2Et2)2Co6S7, (NH2Et2)2Ni8S9, (NH2iso-Pr2)10Fe16S29, (NH2Et2)6Fe8S15, (NH2Et2)2Cu14S15, and (NH2 iso-Pr2)2Cu14S15 were prepd
REACTIONS OF HEXACARBONYL DERIVATIVES OF GROUP-5 METALS (V, NB, TA) WITH 9,10-PHENANTHRENEQUINONE
No full textAromatic hydrocarbons, carbocyclic ligands spanning several oxidation states in both main Group and transition elements. Recent advances with early transition d elements
No full textIn this paper some synthetic procedures to obtain (eta(6)-arene)metal derivatives are reviewed. The metal-atom-arene-vapour co-condensation technique is the most appropriate to generate complexes of polycyclic aromatic hydrocarbons or heterocycles. As far as the aluminium halide-mediated synthesis is concerned, two classes of reaction are observed. When AlX(3) is used with a metal halide in the presence of an aromatic hydrocarbon in the absence of any reducing agent, AlX(3) can function as a dehalogenating agent, to give ionic compounds of general formula [M(eta(6)-arene)n](AlX(4))(m), or it can add across the M-X bond with formation of M(mu-X)(n)AlX(4-n), systems. In both cases the metal displays its typical oxidation state. However, the use of AlX(3) in combination with aluminium (the Fischer-Hafner reducing system) affords ionic or covalent low-oxidation-state metal(eta(6)-arene) complexes. Attention is focused on our most recent results concerning the synthesis, properties and reactivity of eta(6)-arene derivatives of Group 4 and 5 elements, showing, inter alia, the first example of a tetraarylborate anion behaving as a 12-electron donor to one metal atom and low-valent eta(6)-arene compounds as useful reagents in the inorganic and coordination chemistry of the corresponding metal in nonaqueous systems
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