Some halogenation reactions of nido-7,8,9,11-P2C2B7H9.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F02%3A50023002" target="_blank" >RIV/61388980:_____/02:50023002 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Some halogenation reactions of nido-7,8,9,11-P2C2B7H9.

Popis výsledku v původním jazyce

Halogenations of the diphosphadicarbaborane nido-7,8,9,11-P2C2B7H9 using the AlCl3/CCl4, and I-2/AlCl3/C6H6 halogenation systems resulted in the formation of a mixture of mono- and disubstituted derivatives 10-X-nido-7,8,9,11-P2C2B7H8 (for X = Cl and I,yields 6 and 21%, respectively) and 5,10-X-2-nido-7,8,9,11-P2C2B7H7 (for X = Cl and I, yields 57 and 46%, respectively). These results show that the halogenation under electrophilic conditions takes place at positions most distant from the P atoms, but at sites adjacent to the CH units. In contrast, the bromination with N-bromosuccinimide in CH2Cl2 is probably of radical character, proceeding in positions adjacent to the P centres to give 3-Br-nido-7,8,9,11-P2C2B7H8 (yield 41%) and 2,3-Br-2-nido-7,8,9,11-P2C2B7H7 (yield 5%). The mixtures of the halo derivatives were separated by column chromatography on silica gel. Individual compounds were characterized by mass spectrometry and multinuclear (B-11, H-1, and P-31) spectroscopy combined w

Název v anglickém jazyce

Some halogenation reactions of nido-7,8,9,11-P2C2B7H9.

Popis výsledku anglicky

Halogenations of the diphosphadicarbaborane nido-7,8,9,11-P2C2B7H9 using the AlCl3/CCl4, and I-2/AlCl3/C6H6 halogenation systems resulted in the formation of a mixture of mono- and disubstituted derivatives 10-X-nido-7,8,9,11-P2C2B7H8 (for X = Cl and I,yields 6 and 21%, respectively) and 5,10-X-2-nido-7,8,9,11-P2C2B7H7 (for X = Cl and I, yields 57 and 46%, respectively). These results show that the halogenation under electrophilic conditions takes place at positions most distant from the P atoms, but at sites adjacent to the CH units. In contrast, the bromination with N-bromosuccinimide in CH2Cl2 is probably of radical character, proceeding in positions adjacent to the P centres to give 3-Br-nido-7,8,9,11-P2C2B7H8 (yield 41%) and 2,3-Br-2-nido-7,8,9,11-P2C2B7H7 (yield 5%). The mixtures of the halo derivatives were separated by column chromatography on silica gel. Individual compounds were characterized by mass spectrometry and multinuclear (B-11, H-1, and P-31) spectroscopy combined w

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/LN00A028" target="_blank" >LN00A028: Nové a perspektivní anorganické sloučeniny a materiály</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

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

Název periodika

Collection of Czechoslovak Chemical Communications

ISSN

0010-0765

e-ISSN

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Svazek periodika

67

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

8

Strana od-do

783-790

Kód UT WoS článku

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EID výsledku v databázi Scopus

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