Potassium bis(trimethylsilyl)amide (commonly abbreviated as KHMDS, Potassium(K) HexaMethylDiSilazide) or potassium hexamethyldisilazane is the chemical compound with the formula ((CH
3)
3Si)
2NK. It is a strong, non-nucleophilic base with an approximate pK
a of 26 (compare to
lithium diisopropylamide, at 36).
Structure
In the solid state, the unsolvated compound is dimeric, with two potassium and two nitrogen atoms forming a square. This compound is soluble in hydrocarbon solvents and conducts electricity poorly in solution and in the melt. This is attributed to very strong
ion pairing.
[{{cite journal , doi = 10.1021/ic00333a029 , journal = ]Inorg. Chem.
''Inorganic Chemistry'' is a biweekly peer-reviewed scientific journal published by the American Chemical Society since 1962. It covers research in all areas of inorganic chemistry.
The current editor-in-chief is William B. Tolman (Washington Un ...
, title = Ion pairing in is(trimethylsilyl)amido
In linguistics, a copula (plural: copulas or copulae; abbreviated ) is a word or phrase that links the subject of a sentence to a subject complement, such as the word ''is'' in the sentence "The sky is blue" or the phrase ''was not being'' in ...
otassium: The x-ray crystal structure of unsolvated N(SiMe3)2
N, or n, is the fourteenth letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''en'' (pronounced ), plural ''ens''.
History
...
, year = 1990 , last1 = Tesh , first1 = Kris F. , last2 = Hanusa , first2 = Timothy P. , last3 = Huffman , first3 = John C. , volume = 29 , issue = 8 , pages = 1584–1586
See also
*
Metal bis(trimethylsilyl)amides
References
Bis(trimethylsilyl)amides
Potassium compounds
Non-nucleophilic bases