Di-μ-hydroxo-bis(diisopropylgallium)–1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane (1/1)

Boag, Neil M.; Coward, K.M.; Jones, Anthony; Pemble, Martyn E.; Thompson, James R.

doi:10.1107/s0108270100012816

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…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. In an earlier paper one of us reported on the unexpected reaction products from the reaction between Me 3 Ga and the macrocycles [24][25][26]. In the present communication we describe a hydrogen bonded reaction product composed by OenNtn (I), and the cyclic dimer [(t-Bu) 2 Ga(µ-OH)] 2 (II) (Scheme1).…”

Section: Introductionmentioning

confidence: 68%

“…The formation of a 2:1 adduct between macrocycle and dialkyl gallium hydroxide oligomer has been observed in the dimethyl gallium hydroxide by Zhao, et al [23]; in other cases 1:1 or 1:2 adducts have been isolated [23,24,26]. From the product isolated from the reaction we deduced a reaction sequence where the water resisting total removal is giving rise to the formation of the hydroxide (Scheme 2).…”

Section: Description Of the Crystal Structurementioning

confidence: 75%

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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: Introductionmentioning

confidence: 68%

Section: Description Of the Crystal Structurementioning

confidence: 75%

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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“…Compared to the amides the chemistry of gallium hydroxides is more widespread; numerous examples of species containing bridging OH groups are known and also several examples with terminal ones have been described. [112,113,115−125] The compounds [R 2 Ga(µ-OH)] 2 (R = Mes, [28] iPr, [115] (Me 3 Si) 2 CH), [116] and [RR'Ga(µ-OH)] 3 (R = R' = tBu; [117,118] R = R' = Ph, [119] R = (Me 3 Si) 3 C R' = Me) [113] are representatives of bridged hydroxides, whereas [(tBu 3 Si)Ga(OH)(µ-OH)] 4 [120] contains both, bridging and terminal OH groups, respectively.…”

Section: Gallium Hydroxidesmentioning

confidence: 99%

Synthesis, Structural Studies and Reactivity of Monomeric Organo Aluminum and Gallium Amides, Hydrogensulfides and Hydroxides Using N-Heterocyclic Carbene: Precursors for Heterobimetallic Systems

Jancik¹

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V volume vst very strong w weak Z number of molecules in the unit cell for stabilization of low coordination numbers of 3 on such electropositive elements as Mg 2+ in L'MgMe [36] and Fe 2+ in L'FeCl. [28] Their other advantage is the possibility to stabilize such unique species as the first monomeric LAl containing aluminum in the rare oxidation state +I, [27] the first stable Ge 2+ hydride LGeH, [37] and the first structurally characterized metal hydroselenides of LAl(SeH) 2 and a Se bridged species [LAl(SeH)] 2 Se. [26] Recently, H. W. Roesky et al. reported on the preparation of the first stable aluminum congener of boronic Recently, H. W. Roesky et al. have successfully synthetized several unique molecular hydroxides based e.g. on silicon ((2,6-iPrC 6 H 3 )(SiMe 3 )NSi(OH) 3 , and [(Me 3 Si) 2 CHSi(µ-O)(OH)] 3), [107,108] aluminum (LAl(OH) 2 , and [LAl(OH)] 2 O) [38,109] or tin [(Me 3 Si) 3 CSn(µ-O)(OH)] 3 [110] (Figure 4). Aluminum hydroxides and aluminoxanes play an important role in this field due to the application as cocatalysts, and numerous examples of these species have 2 4 KI, H 2 NH 3 (l)/toluene Ar = Scheme 2: Synthesis of LAl(OH) 2 and [LAl(OH)] 2 O in the two phase system liquid ammonia/toluene.

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Gallium, Indium, and Thallium, Excluding Transition Metal Derivatives

Schulz

2007

Comprehensive Organometallic Chemistry III

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Di-μ-hydroxo-bis(diisopropylgallium)–1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane (1/1)

Cited by 5 publications

References 13 publications

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

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

Synthesis, Structural Studies and Reactivity of Monomeric Organo Aluminum and Gallium Amides, Hydrogensulfides and Hydroxides Using N-Heterocyclic Carbene: Precursors for Heterobimetallic Systems

Gallium, Indium, and Thallium, Excluding Transition Metal Derivatives

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