Cyclic trimeric hydroxy, amido, phosphido, and arsenido derivatives of aluminum and gallium. X-ray structures of [tert-Bu2Ga(.mu.-OH)]3 and [tert-Bu2Ga(.mu.-NH2)]3

Atwood, David A.; Cowley, Alan H.; Harris, Paul; Jones, Richard A.; Koschmieder, Stefan U.; Nunn, Christine M.; Atwood, Jerry L.; Bott, Simon G.

doi:10.1021/om00025a010

Cited by 61 publications

(45 citation statements)

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“…Smaller ring size is favored by the bulky t-butyl groups, which could force the angle O-Ga-O´ (found to be ∼80°) to become smaller than that found for the corresponding trinuclear compound [t-Bu 2 Ga(µ-OH)] 3 (∼ 96°) [17][18][19]. In our case, the formation of an adduct with two hydrogen bonds between [(t-Bu) 2 Ga(µ-OH)] 2 and two OenNtn molecules would demand a small Ga-O-Ga angle for making an efficient hydrogen bond.…”

Section: Description Of the Crystal Structurementioning

confidence: 87%

“…On the other hand the trimeric t-Bu derivative is forced into a conformation with a planar Ga 3 O 3 ring [18,19]. The crystal structure of [(t-Bu) 2 Ga(µ-OH)] 3 also reveals that oxygen posses a trigonal, planar geometry [19]. This is also nearly the case in the much less hindered DFT geometry of [Me 2 Ga(µ-OH)] 3 .…”

Section: Dft Calculationsmentioning

confidence: 87%

“…In the six-membered ring a larger Ga-O-Ga angle (∼143°) is needed [18][19], and this should make the oxygen less likely to take part in a strong hydrogen bond. The hydrogen bonding pattern can be considered to mimic the structure of alkoxy-bridged dialkylgallium compounds, which often have been isolated as dimers [17,[27][28][29].…”

Section: Methodsmentioning

confidence: 99%

“…X-ray crystallography of this adduct has shown that the dimethyl derivative is in a skew boat conformation. On the other hand the trimeric t-Bu derivative is forced into a conformation with a planar Ga 3 O 3 ring [18,19]. The crystal structure of [(t-Bu) 2 Ga(µ-OH)] 3 also reveals that oxygen posses a trigonal, planar geometry [19].…”

Section: Dft Calculationsmentioning

confidence: 99%

“…There has been some discussion of whether the tetramer or smaller oligomers are predominant in equilibrium dominated solutions as this question is only answered by very precise measurements [15,16]. More recently the cyclic trimer [t-Bu 2 Ga(µ-OH)] 3 has been described [17][18][19] [20][21][22]. The nature of the alkyl substituent on gallium apparently can determine which oligomer is formed in the solid phase, but the presence of a co-crystallizing agent can also influence the nature of the products.…”

Section: Introductionmentioning

confidence: 99%

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Tetra-tert-Butyl-di-m-Hydroxo Digallium(III) and 1,12-Diaza-3,4:9,10-Dibenzo-5,8-Dioxo-cyclo-Pentadecane. Structure and Isomers of the Coordination Compound

Sun¹,

Thulstrup²,

Larsen

et al. 2005

IJMS

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Tri-t-butylgallium has been reacted with the macrocycle 1,12-diaza-3,4:9,10-dibenzo-5,8-dioxocyclopentadecane which could be a potential ligand for gallium(III). A reaction product was analyzed and single crystal X-ray diffraction experiments showed that it consisted of the cyclic dimer of di-t-butylgallium-hydroxide hydrogen bonded to the macrocycle. Without a co-crystallized organic molecule di-t-butylgallium hydroxide crystallizes as a trimer. Density functional calculations have been used to predict the structures and the total energies for the monomer, dimer, trimer, and tetramer of dimethylgallium hydroxide in order to provide a basis for the understanding of oligomer population for the dimethylgallium hydroxides. Force field calculations are shown to be able to produce a similar strain energy difference for dimer, trimer, and tetramer forms of (CH 3 ) 2 Ga(OH) and this method can economically be used for larger alkyl groups. The force field computations show that the trimeric di-t-butyl gallium(III) hydroxide is much Int. J. Mol. Sci. 2005, 6 277 more stable than the dimeric form which therefore must owe its existence to the association with the hydrogen-bonded macrocycle.

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Section: Description Of the Crystal Structurementioning

confidence: 87%

Section: Dft Calculationsmentioning

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Section: Dft Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Tetra-tert-Butyl-di-m-Hydroxo Digallium(III) and 1,12-Diaza-3,4:9,10-Dibenzo-5,8-Dioxo-cyclo-Pentadecane. Structure and Isomers of the Coordination Compound

Sun¹,

Thulstrup²,

Larsen

et al. 2005

IJMS

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Arsenic: Organoarsenic Chemistry

Krannich

Watkins

2005

Encyclopedia of Inorganic Chemistry

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This review surveys the chemistry, reactivity, spectroscopic, and structural aspects of several major classes of organometallic arsenic compounds over the time period of 1760 through 2003. These compounds are the core of the field and represent the major areas of research thrusts during this period. We draw heavily from several books, monographs, and review articles to review the primary synthetic routes and reactivity. The primary literature is referenced for all developments that have occurred since the last published review articles. After an extensive review of the fully substituted and AsH bond containing organoarsenic compounds, the focus is on compounds containing AsHalogen, As group 13, As group 14, As group 15, and AsO bonds. Because of the efforts to synthesize As group 13 bonded compounds of the heavier group 13 elements, tables listing the known compounds synthesized after 1985 and their method of preparation are provided.

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