Alkoksi

Gugus alkoksi
Gugus ariloksi

Dalam kimia, gugus alkoksi adalah gugus alkil (rantai karbon dan hidrogen) berikatan tunggal ke oksigen dengan demikian: R–O. Rentang gugus alkoksi sangat besar, yang paling sederhana adalah metoksi (CH3O–). Sebuah gugus etoksi (CH3CH2O–) ditemukan dalam senyawa organik etil fenil eter, C6H5OCH2CH3 yang juga dikenal sebagai etoksibenzena. Terkait dengan gugus alkoksi adalah gugus arikloksi, yang memiliki gugus aril berikatan tunggal dengan oksigen seperti gugus fenoksi (C6H5O–).

Sebuah gugus alkoksi atau ariloksi yang terikat ke sebuah alkil atau aril (R1–O–R2) adalah eter. Jika terikat ke H maka adalah alkohol. Sebuah alkoksida (RO) adalah bentuk ion atau garam; senyawa ini adalah turunan dari alkohol di mana proton digantikan oleh logam, biasanya natrium.

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