New boron icosahedral ethers and esters formed from Cs.sub.2 [closo-B.sub.12 (OH).sub.12 ],; Cs[closo-1-H-1-CB.sub.11 (OH).sub.11 ]; and closo-1,12-H.sub.2 -1,12-C.sub.2 B.sub.10 (OH).sub.10 are disclosed. Also set forth are their preparation by reacting the icosahedral boranes [closo-B.sub.12 H.sub.12 ].sup.2-, [closo-1-CB.sub.11 H.sub.12 ].sup.- and closo-1,12-(CH.sub.2 OH).sub.2 -1,12-C.sub.2 B.sub.10 H.sub.10 with an acid anhdride or acid chloride to form the ester or an alkylating agent to form the ether.

Les éthers icosaèdres et les esters de nouveau bore ont formé de Cs.sub.2 [ closo-B.sub.12 (OH).sub.12 ], ; Cs[closo-1-H-1-CB.sub.11 (OH).sub.11 ] ; et closo-1,12-H.sub.2 -1,12-C.sub.2 B.sub.10 (OH).sub.10 sont révélés. En outre déterminées sont leur préparation en réagissant les boranes icosaèdres [ closo-B.sub.12 H.sub.12 ].sup.2 -, [ closo-1-CB.sub.11 H.sub.12 ].sup. - et closo-1,12-(CH.sub.2 OH).sub.2 -1,12-C.sub.2 B.sub.10 H.sub.10 avec du chlorure acide d'anhdride ou d'acide pour former l'ester ou un agent d'alkylation pour former l'éther.

 
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