Towards NHC stabilized alkylgallium alkoxide/aryloxide cations – The advances, the limitations and the challenges

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00474178" target="_blank" >RIV/61388955:_____/17:00474178 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.jorganchem.2017.03.046" target="_blank" >http://dx.doi.org/10.1016/j.jorganchem.2017.03.046</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jorganchem.2017.03.046" target="_blank" >10.1016/j.jorganchem.2017.03.046</a>

Result language

angličtina

Original language name

Towards NHC stabilized alkylgallium alkoxide/aryloxide cations – The advances, the limitations and the challenges

Original language description

Here we describe and discuss an approach to the synthesis of alkylgallium alkoxide and aryloxide cations stabilized with N-heterocyclic carbenes (NHCs). The reaction of methyl abstracting agent B(C6F5)3 with Me2Ga(OAr,CNHC) complexes stabilized by aryloxide ligands with N-heterocyclic carbene functionalities (1 and 2) has led to the formation of cationic complexes [MeGa(OAr,CNHC)]22+ (32+ and 42+). [3][MeB(C6F5)3]2 and [4][MeB(C6F5)3]2, which are the first examples of alkylgallium aryloxide cationic complexes, have been isolated and characterized by both spectroscopic and X-ray techniques. In contrast, the reaction of alkoxide derivative Me2Ga(O,CNHC) (5) with B(C6F5)3 and [Ph3C][B(C6F5)4] has led to the formation of adducts Me2Ga(O,CNHC)·B(C6F5)3 (6) and [Me2Ga(O,CNHC)·Ph3C]+. Although, the reactions of B(C6F5)3 with Me2Ga(OC6H4OMe)(SIMes) (7) or Me2GaOMe(SIMes) (8) (SIMes = 1,3-bis(2,4,6-trimethylphenyl)imidazolin-2-ylidene) have resulted in the formation of cationic species [MeGaOR(SIMes)]+, as evidenced by spectroscopic techniques, the side reactions resulting in the formation of (SIMes)B(C6F5)3 and boron alkoxide species have also been observed. Cationic complexes [3][MeB(C6F5)3]2 and [4][MeB(C6F5)3]2 are poor catalysts for the ring-opening polymerization of cyclic esters and are essentially not active in the low pressure polymerization of ethylene.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10403 - Physical chemistry

Project

<a href="/en/project/GA14-08531S" target="_blank" >GA14-08531S: Organometallic frustrated Lewis pairs for stoichiometric and catalytic bond activations</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Organometallic Chemistry

ISSN

0022-328X

e-ISSN

—

Volume of the periodical

840

Issue of the periodical within the volume

JUL 2017

Country of publishing house

CH - SWITZERLAND

Number of pages

7

Pages from-to

63-69

UT code for WoS article

000401126700008

EID of the result in the Scopus database

2-s2.0-85018325928