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Dinuclear

Elliott C M, Derr D L, Matyushov D V and Newton M D 1998 Direct experimental comparison of the theories of thermal and optical electron-transfer studies of a mixed-valence dinuclear iron polypyridyl complex J. Am. Chem. [Pg.2995]

Fig. 19. Multiple and multisite substrate recognition (a) a homo dinuclear (dicationic) and (b) a heterodinuclear (cation and anion) iaclusion complex (c) a... Fig. 19. Multiple and multisite substrate recognition (a) a homo dinuclear (dicationic) and (b) a heterodinuclear (cation and anion) iaclusion complex (c) a...
Molybdenum(V) compounds generally occur as mononuclear or dinuclear species. Molybdenum pentachloride [10241-05-1] MoCl, formed by combination of the elements, serves as a usebil and reactive starting material (Fig. 1). MoCl has a dinuclear stmcture (Fig. 3) in the soHd state but is mononuclear in the gas phase. In solution or in the soHd state the compound, actually Mo2C1 q (Fig- 3a), is readily hydroly2ed in air to form MoOCl ... [Pg.471]

Interestingly, the Mo2S " 4 (Fig- 3f) core stmcture can be viewed as occupying six of the eight vertices of a distorted cube. Reaction of the dinuclear complexes having the Mo2S " 4 core with appropriate metal ions leads to the plaimed assembly of M2M02S4 thiocubane stmctures (19,20). When M = Co (Fig. 3h) the compounds are potential precursors for hydrodesulfurization catalysts (15). [Pg.471]

The dinuclear ion Mo2(S2) g (F - prepared from the reaction of molybdate and polysulfide solution (13) is a usehil starting material for the preparation of dinuclear sulfur complexes. These disulfide ligands are reactive toward replacement or reduction to give complexes containing the Mo2S " 4 core (Fig. 3f). [Pg.471]

Molecular examples of trivalent molybdenum are known in mononuclear, dinuclear, and tetranuclear complexes, as illustrated in Figure 5. The hexachloride ion, MoCk (Fig- 5a) is generated by the electrolysis of Mo(VI) in concentrated HCl. Hydrolysis of MoCP in acid gives the hexaaquamolybdenum(III) ion, Mo(H20) g, which is obtainable in solution of poorly coordinating acids, such as triflic acid (17). Several molybdenum(III) organometaUic compounds are known. These contain a single cyclopentadienyl ligand (Cp) attached to Mo (Fig. 5d) (27). [Pg.472]

Dinuclear stmctures are known for molybdenum(III) in a series of air and moisture sensitive compound containing multiple Mo—Mo bonds. Examples include Mo2(N(CH2)2)g (Fig- 5b) and Mo2(CH2Si(CH2)3)g in which there is a strong Mo—Mo bond, presumably of triple-bond character (28). [Pg.473]

Divalent molybdenum compounds occur in mononuclear, dinuclear, and hexanuclear forms. Selected examples are shown in Figure 6. The mononuclear compounds are mostiy in the realm of organometaUic chemistry (30—32). Seven-coordinate complexes are common and include MoX2(CO)2(PR3)2, where X = Cl, Br, and I, and R = alkyl MoCl2(P(CH3)3)4, heptakis(isonitrile) complexes of the form Mo(CNR) 2 (Fig. 6d), and their chloro-substituted derivatives, eg, Mo(CNR)3CR. The latter undergo reductive coupling to form C—C bonds in the molybdenum coordination sphere (33). [Pg.473]

The dinuclear compounds of molybdenum(II) have strong, quadmple, molybdenum—molybdenum bonds and ecHpsed stmctures, such as those of Mo2CF g (Fig- 6 ) Mo2(02CCH3)4 (Fig. 6b). These quadmply bonded complexes have been intensely studied from the point of view of their... [Pg.473]

According to one classification (15,16), symmetrical dinuclear PMDs can be divided into two classes, A and B, with respect to the symmetry of the frontier molecular orbital (MO). Thus, the lowest unoccupied MO (LUMO) of class-A dyes is antisymmetrical and the highest occupied MO (HOMO) is symmetrical, and the TT-system contains an odd number of TT-electron pairs. On the other hand, the frontier MO symmetry of class-B dyes is the opposite, and the molecule has an even number of TT-electron pairs. [Pg.489]

Asymmetrical dyes can be obtained by condensation of the y-formyl-substituted dinuclear polymethine with the corresponding heterocycHc salt. [Pg.499]

Polynuclear Carbonyls. Several stmctures consist of dinuclear metal carbonyls as shown in stmctures (4)—(6). The metal atoms in Mn2(CO) Q, as also for technetium and rhenium, are held together by a metal—metal bond and the compound contains 10 terminal CO ligands, five coordinated to each atom. The CO ligands of Mn2(00) 0 adopt a staggered configuration as illustrated in stmcture... [Pg.63]

The results for dinuclear and polynuclear oxoacids are also consistent with this interpretation. Thus for phosphoric acid, H4P2O7, the successive p/fa values are 1.5, 2.4, 6.6 and 9.2 the 10-fold decrease between p/f and p/f2 (instead of a decrease of 10 ) is related to the fact that ionization occurs from two different PO4 units. The third stage ionization, however, is less than the first stage and the differ-... [Pg.51]

Figure 14.7 Schematic representation of the structure of the dinuclear cation in [ Co(pyd-ien))202]Lj showing some important dimensions. Figure 14.7 Schematic representation of the structure of the dinuclear cation in [ Co(pyd-ien))202]Lj showing some important dimensions.
CO)2(thf)] reacts in thf solution at 25°C to give [HRe(rj -C5Me5)(CO)2(TeH)] and related dinuclear complexes.The Te analogue of the hydroxide ion, TeH , has been reported from time to time but has only recently been properly characterized crystallographically, in [PPh4]+[TeH]-... [Pg.767]

Ruthenium provides more examples of dinuclear compounds in which the metal is present in a mixture of oxidation states (or in a non-integral oxidation state) than any other element. [Pg.1097]

Figure 26.2 O2 bridges in dinuclear cobalt complexes (a) peroxo (02 ) bridge, and (b) superoxo (02 ) bridge. Figure 26.2 O2 bridges in dinuclear cobalt complexes (a) peroxo (02 ) bridge, and (b) superoxo (02 ) bridge.

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A Phototunable Dinuclear Catalyst

Alkylidyne complex, dinuclear

Biomimetics of Dinuclear Metallohydrolases

Blue species dinuclear

Bonding in Dinuclear Metal Compounds

Bonds in Dinuclear Complexes

Boron dinuclear metal complex

Boronates, dinuclear structures

C5B Ring Dinuclear Complexes (Triple-decker Sandwiches and Dimers)

Carboxylates dinuclear compounds

Catalytic system dinuclear

Cation structures dinuclear complexes

Chemical reactivity dinuclear complexes

Chiral dinuclear metal complex

Chromium compounds dinuclear complexes

Chromium hydroxo-bridged complexes dinuclear

Cleavage mechanism, dinuclear complexes

Cluster chemistry dinuclear/trinuclear complexes

Cluster dinuclear

Comparisons of dinuclear iron centers in ferritins and other proteins

Complexes dinuclear

Conservation of dinuclear metal centers in ferritins

Copper compounds dinuclear complexes

Copper dinuclear sites

Copper dioxygen complexes dinuclear

Copper-dioxygen compound dinuclear

Cryptates dinuclear

Crystal structures dinuclear complexes

Cyanide dinuclear iron cyanides

Cyanides dinuclear complexes

Cyclopentadienyl anion dinuclear complexes

Cyclopropanation dinuclear copper complexes

Diethyl ether dinuclear

Dinuclear 2Fe-2S analogues

Dinuclear Copper Carboxylates

Dinuclear Cu complexes

Dinuclear Intermediates - Direct Observation

Dinuclear Intermediates - Indirect Evidence

Dinuclear Metallohydrolases

Dinuclear N2 complex

Dinuclear Pd complex

Dinuclear Tc

Dinuclear Zinc Hydrolase Mimics

Dinuclear and Polynuclear Metal Ion Cryptates

Dinuclear and polynuclear complexes

Dinuclear anionic gold

Dinuclear binucleating ligands

Dinuclear carbonyl complexes

Dinuclear carbonyls

Dinuclear carbonyls matrix isolation

Dinuclear carbonyls preparation

Dinuclear carboxylates

Dinuclear catalysts

Dinuclear chromium complexes

Dinuclear clusters bond order

Dinuclear clusters electronic configuration

Dinuclear cobalt complexes

Dinuclear complexes osmium

Dinuclear complexes rhodium

Dinuclear complexes, absorption

Dinuclear complexes, absorption spectra

Dinuclear complexes, cyanide-bridged

Dinuclear complexes, hydrogen bonding

Dinuclear complexes, quadruply bridged structure

Dinuclear compounds

Dinuclear compounds electrochemistry

Dinuclear compounds nomenclature

Dinuclear compounds photochemistry

Dinuclear compounds structure

Dinuclear compounds symmetrical

Dinuclear compounds unsymmetrical

Dinuclear compounds, double hydrogen

Dinuclear compounds, double hydrogen bridges

Dinuclear copper bridged

Dinuclear copper centres

Dinuclear copper complexes

Dinuclear copper complexes TMPA)Cu

Dinuclear copper complexes modeling hemocyanin

Dinuclear copper proteins

Dinuclear copper proteins electronic structure

Dinuclear copper proteins model complexes

Dinuclear covalently bridged

Dinuclear cyanines

Dinuclear elimination

Dinuclear gold amidinate

Dinuclear gold® complexes moieties

Dinuclear hydrocarbon activation

Dinuclear hydroxo-bridged complexes

Dinuclear intermediate

Dinuclear iridium complexes

Dinuclear iridium complexes formation

Dinuclear iridium diphosphine complex

Dinuclear iron center

Dinuclear iron complexes

Dinuclear iron complexes Fe2

Dinuclear iron complexesFe

Dinuclear iron cyanides

Dinuclear iron-sulfur clusters

Dinuclear iron-sulfur species

Dinuclear luminescent

Dinuclear macrocycle

Dinuclear macrocyclic systems

Dinuclear manganese

Dinuclear manganese center

Dinuclear manganese chelates

Dinuclear manganese complexes

Dinuclear metal carbonyls

Dinuclear metal carboxylates

Dinuclear metal centers

Dinuclear metal complex bridging

Dinuclear metal complex rhenium

Dinuclear metal complex tungsten

Dinuclear metal complexes

Dinuclear metal complexes, novel

Dinuclear metal complexes, novel reactions

Dinuclear metal compounds

Dinuclear metal-sulfur complexes

Dinuclear metallasilsesquioxane

Dinuclear molybdenum, bonding, bridging

Dinuclear nonheme iron enzymes

Dinuclear organometallics

Dinuclear organometallics bonds

Dinuclear oxidative-addition reactions

Dinuclear oxo complexes

Dinuclear palladium complex isomerization

Dinuclear palladium compounds

Dinuclear peroxo dioxygen

Dinuclear peroxo dioxygen complex

Dinuclear peroxotungstate

Dinuclear phosphoesterase enzymes

Dinuclear phosphoesterase enzymes functional model complexes

Dinuclear platinum complexe

Dinuclear platinum complexes

Dinuclear platinum complexes olefins

Dinuclear rhenium complexes with

Dinuclear ruthenium catalysts

Dinuclear site Dioxygen

Dinuclear site Electrochemical

Dinuclear site Electron transfer

Dinuclear site Energy

Dinuclear site Enzymatic

Dinuclear site Epoxidation

Dinuclear site Epoxides

Dinuclear site activation

Dinuclear site adduct

Dinuclear site agents

Dinuclear site analysis

Dinuclear site binding constant

Dinuclear site carriers

Dinuclear site chain

Dinuclear site complex

Dinuclear site measurements

Dinuclear site radical

Dinuclear site reactions with metal complexes

Dinuclear site reactivity

Dinuclear site structure reactivity

Dinuclear site studies

Dinuclear site transfer

Dinuclear sites

Dinuclear species

Dinuclear spin-crossover compounds

Dinuclear structural motifs

Dinuclear structures

Dinuclear structures rhenium

Dinuclear substituents

Dinuclear supermolecules

Dinuclear systems

Dinuclear titanium-sulfonamide

Dinuclear titanium-sulfonamide complex

Dinuclear trifluoromethyl isocyanide

Dinuclear trifluoromethyl isocyanide complexes and cluster compounds

Dinuclear vanadium complexes

Dioxygen reactions with dinuclear iron

Diphosphine bridged dinuclear metal

Electronic dinuclear complexes

Ferroxidase activity of the dinuclear centers in H-type ferritins

Formulae dinuclear species

Gold complexes dinuclear

Gold species, dinuclear

Halide complexes dinuclear

Heterospin dinuclear systems

Homometallic dinuclear complex

Homospin dinuclear systems

Hydrazine-bridged dinuclear

Hydroxylase dinuclear iron center

Intramolecular alkyl ligand transfer in dinuclear complexes

Iridium dinuclear

Iron compounds dinuclear complexes

Iron dinuclear

Iron-sulfur cluster compounds dinuclear

Luminescence dinuclear gold complexes

Luminescence properties dinuclear

Macrocycles dinuclear complexes

Macrocyclic complexes dinuclear copper sites

Macrocyclic complexes dinuclear sites

Manganese compounds dinuclear complexes

Metal carbonyls dinuclear compounds

Metal dinuclear

Metal dinuclear transition

Metal dinuclear, novel reactions

Metallomacrocycles, dinuclear

Mixed-valent complexes, dinuclear

Molybdenum complexes dinuclear

Molybdenum compounds, dinuclear

Molybdenum dinuclear

Molybdenum dinuclear chemistry

Molybdenum dinuclear sulfur-bridged

Molybdenum dinuclear sulfur-bridged complexes

Mono- and dihydroxo-bridged dinuclear

Mono- and dihydroxo-bridged dinuclear equilibria

Networks from Dinuclear Units

Nickel dinuclear

Non-isotropic exchange in dinuclear systems

Non-symmetrical dinuclear compounds

Organometallic chemistry, dinuclear

Organometallic complexes dinuclear

Osmium clusters dinuclear

Other interactions in dinuclear systems

Oxidative addition dinuclear

Oxidative addition dinuclear additions

Oxide-bridged dinuclear complexes

Oxide-bridged dinuclear complexes structural parameters

Palladium complexes dinuclear. catalysis

Palladium dinuclear complexes

Peroxo dinuclear copper complexes

Phosphines dinuclear

Phosphoesterase enzymes, dinuclear complex

Phosphoesterase enzymes, dinuclear model complexes

Platinum bridged dinuclear

Platinum compounds dinuclear

Polynuclear transition metal complexes dinuclear

Polynuclear transition metal complexes dinuclear carbonyls

Polysulfide ligands dinuclear

Preparation of Metal-Sulfur Clusters from Dinuclear Precursors

Quadruply Bridged Dinuclear

Quadruply Bridged Dinuclear Complexes

Quadruply Bridged Dinuclear Complexes of Platinum, Palladium

Quadruply Bridged Dinuclear Complexes of Platinum, Palladium, and Nickel

Radicals dinuclear compounds

Rhenium complex dinuclear

Rhodium complexes dinuclear activation

Rhodium dinuclear

Rhodium dinuclear intermediates

Ruthenium complexes, reactions dinuclear bridged

Ruthenium dinuclear carboxylate

Ruthenium dinuclear carboxylate complexes

Ruthenium, dinuclear complexes

Ruthenium, dinuclear complexes, redox

Schiff base dinuclear catalyst

Silver dinuclear complex

Spin Crossover in Dinuclear Iron(II) Complexes

Spin crossover in dinuclear compounds

Synthetic dinuclear complexes

The Shape of Dinuclear Molecules

Thiolates dinuclear complexes

Titanium complexes dinuclear

Transition complexes, dinuclear

Transition metals dinuclear complexes

Trefoil helical dinuclear complex

Tungsten carboxylate dinuclear complexes

Tungsten complexes dinuclear

Tungsten dinuclear

Weakly coupled dinuclear system

Zinc complex, dinuclear

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