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Response to NNadir (Reply #5)

Sun Mar 28, 2021, 07:56 AM

6. Yes, apparently it was electrides that led Dye et al. to try making alkalides originally.

IIRC, there was an article on this in Scientific American when I was in high school -- or maybe not. I just know I came across it at a time when I knew enough about chemistry to find such a thing almost unthinkable. Alkali metals were always cations! But someone thought otherwise. If I search my old notes I might find a record of a lecture from grad school on cryptands, so it's been brought to my attention a couple of times.


Then there's this:
Rare oxidation states

Less common oxidation states of gold include −1, +2, and +5.

The −1 oxidation state occurs in aurides, compounds containing the Au− anion. Caesium auride (CsAu), for example, crystallizes in the caesium chloride motif;[39] rubidium, potassium, and tetramethylammonium aurides are also known.[40] Gold has the highest electron affinity of any metal, at 222.8 kJ/mol, making Au− a stable species.[41]


and this:


Apparently both BaPt and Cs2Pt are known.

Oh, and Pekka Pyykö (I love that name!) has predicted that Oganesson - element 118, a "noble gas" element, should form an anion - good thing IUPAC gave that name the nonmetallic -on ending!

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NNadir Mar 27 OP
Karadeniz Mar 27 #1
eppur_se_muova Mar 27 #2
NNadir Mar 28 #5
LineLineLineNew Reply Yes, apparently it was electrides that led Dye et al. to try making alkalides originally.
eppur_se_muova Mar 28 #6
keithbvadu2 Mar 27 #3
lastlib Mar 27 #4
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