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The first paragraph says:
does "valuable" have a specific chemical meaning, or does this just mean that it's costly to produce or extract from natural sources and therefore "valuable" in a monetary sense. Not really critical to the meaning of the article, I'm just curious. Thx. Zero sharp 19:32, 5 January 2007 (UTC)
"Valuable" here means that BF3 is a USEFUL Lewis acid. It is used in myriad applications, from catalyzing aldol reactions to removal of a variety of protecting groups. This is a common term in organic chemistry, though as you point out it can be misleading. Shultzc (talk) 03:13, 25 March 2008 (UTC)
My chemistry book explicitly says this: File:BF3 illustration.png
I'm a bit confused on this. Juraj5 (talk) 10:44, 3 May 2008 (UTC)
Inorg. Chem., 1997, 36 (14), 3022–3030 suggests that:
This is alluded to in the article at present, but is presented as an alternative explanation. It seems, though, that the above is a better explanation, compatible with calculated partial charges (B: +2.43, F: −0.81) which indicate BF3 is predominantly an ionic molecule. The fact that BF3 does not condense to an ionic solid is explained by "size limitations on the maximum coordination number" that boron can achieve. If BF3 adopted the AlF3 structure (ionic solid), boron would be octahedrally coordinated by six fluorides.
Does anyone have any particular expertise in this area, or know of more recent conclusions?
Ben (talk) 14:41, 24 January 2009 (UTC)
Okay, I'll put it on my list! Thanks for the reply.
Ben (talk) 19:14, 24 January 2009 (UTC)
I was just using the terminology in the paper cited above. I can send you a copy if you like. I think your definition of π back bonding sounds like the most usual usage. Maybe F→B π donation is sometimes termed back bonding because it is in the opposite direction to the usual B-F bond polarity, with the much more electronegative fluorine drawing electron density away from boron. Ben (talk) 15:03, 10 February 2010 (UTC)
i find it very... irritating that in the equation boric acids formula is in parenthesis. either remove parenthesis or write as H3BO3
Steve Z: Previously listed anhydrous density of 2.167 g/cm3 was misleading. For liquid anydrous BF3, Carl Yaws' Chemical Properties Handbook liquid density curve ranges from 0.549 g/cm3 at critical temperature (-12.3 C) to 1.678 g/cm3 at -127 C, with 1.572 g/cm3 at atmospheric boiling point. Anhydrous BF3 can't be liquefied at 25 C, new density is ideal-gas density at 25 C and 100 kPa. —Preceding unsigned comment added by 216.203.59.252 (talk) 21:28, 16 April 2010 (UTC)
not sure where to put this:
Boron trifluoride was discovered in the autumn of 1808 by Joseph Louis Gay-Lussac and Louis Jacques Thénard, who were trying to isolate fluoric acid by combining calcium fluoride with vitrified boric acid; the resulting vapours failed to etch glass, so they named it fluoboric gas.<ref>“Sur l’acide fluorique,” Annales de chimie, 69 (1809), 204–220, written with Thénard; “Des propriétés de l’acide fluorique et surtout de son action sur le métal de la potasse,” in Mémories de physique et de chimie de la Société d’Arcueil, 2 (1809), 317–331, written with Thénard.</ref> -- 99.233.186.4 (talk) 01:35, 21 July 2010 (UTC)
I don't quite understand this section: Unlike the aluminium trihalides, the boron trihalides are all monomeric. They do undergo rapid reversible dimerization as indicated by the high rate of the halide exchange reactions:
That reaction doesn't show a dimer. Is the intent of this to imply that this reaction must have an intermediate transient dimer of B2F3Cl3 ? If so, perhaps the intermediate step should be mentioned, and the word "transient" added before "dimerization."
Also, since the word "reversable" is used, this should show a two-directional arrow, not a one-directional arrow. Geoffrey.landis (talk) 14:29, 11 October 2011 (UTC)
Most chemists encounter BF3 as its etherate, but we dont have an article on that reagent. So I am planning to convert the redirect entitled boron trifluoride etherate. If folks see any problems with my plans, leave a note here or on my talk page.--Smokefoot (talk) 20:29, 11 August 2017 (UTC)
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