Oxalate fluoride

Class of chemical compounds From Wikipedia, the free encyclopedia

An oxalate fluoride is a mixed anion compound contains both oxalate and fluoride anions. Many of these compounds have high birefringence.[1]

With nonmetals, some are related to the oxalatophosphates and oxalatoborates with the addition of fluoride.

Formation

For some metal oxalate complexes, fluoride can displace some oxalate. This happens with aluminium.[2]

With gallium the reverse happens, and oxalate displaces fluoride ligands.[2]

Use

Difluorooxalaotoborates are under investigation as electrolytes, or electrolyte additives in lithium ion batteries or supercapacitors. Their advantage is greater thermal stability, up to 200 or 300 °C, ability to form ionic liquids, and for supercapacitors, support for higher voltages (3 volts).[3]

List

More information formula, name ...
formula name crystal space group cell volume density comment ref
N(CH3)4BF2C2O4 tetramethylammonium difluoro(oxalato)borate [4]
N(CH2CH3)4BF2C2O4 tetraethylammonium difluoro(oxalato)borate [5]
triethylmethylammonium difluoro(oxalato)borate melt 15 °C; white [6]
N(-CH2CH2CH2CH2-)(CH2CH2CH3)(CH3)BF2C2O4 N-Propyl-N-Methylpyrrolidinium Difluoro(oxalato)borate (Py13DFOB) melt 3.21 °C [7]
N(-CH2CH2CH2CH2-)(CH2CH2CH2CH3)(CH3)BF2C2O4 N-butyl-N-methylpyrrolidinium difluoro(oxalato)borate (Py14DFOB) melt −5 °C [8]
N(-CH2CH2CH2CH2-)(CH2CH2CH2CH2CH3)(CH3)BF2C2O4 N-pentyl-N-methylpyrrolidinium difluoro(oxalato)borate (Py15DFOB) glass transition −74 °C [8]
N(-CH2CH2CH2CH2-)(CH2CH2CH2CH2CH2CH3)(CH3)BF2C2O4 N-hexyl-N-methylpyrrolidinium difluoro(oxalato)borate (Py16DFOB) melt 31 °C [8]
1-ethyl-1-methylpyrrolidinium difluoro(oxalato)borate melt 10 °C; white [6]
N-ethoxyethyl-N-methylpiperidinium difluoro(oxalato)borate [3]
1-ethyl-3-methylimidazolium difluoro(oxalato)borate, [C2mim][DFOB] [6]
1-butyl-3-methylimidazolium difluoro(oxalato)borate [6]
N-ethoxyethyl-N-methylpiperidinium difluoro(oxalate)borate ionic liquid, gl;ass transition -70 °C [9]
N-propyl-N-methylpiperidinium difluoro(oxalate)borate ionic liquid [9]
LiBF2C2O4 lithium difluoro(oxalato)borate orthorhombic Cmcm a = 6.2623 b = 11.437 c = 6.3002 Z = 4 451.22 [10]
LiBF2C2O4·2H2O lithium difluoro(oxalato)borate dihydrate monoclinic P21/c a = 9.5580 b = 12.7162 c = 5.4387 Z = 4 634.63 [10]
NaBF2C2O4 sodium difluoro(oxalato)borate tetragonal I41md a=7.7316 c=8.5343 510.16 [11]
Na(C2BF2O4)(CH3CN)2 orthorhombic Pnma a=11.6932 b = 14.1254 c = 6.5130 Z=4 1075.76 B tertrahedral coordination by 2 F and twice by -OCCO- [12]
Na3Al(C2O4)2F2.3H2O soluble [2]
triethylmethylphosphonium difluoro(oxalato)borate melt 9 °C; white [6]
diethylisobutylmethylphosphonium difluoro(oxalato)borate melt 23 °C; white [6]
triisobutylmethylphosphonium difluoro(oxalato)borate [6]
tributylethylphosphonium difluoro(oxalato)borate [6]
lithium tetrafluoro(oxalato)phosphate (LiTFOP) Octahedral arrangement; P-OCCO- ring [13]
lithium difluorobis bis (oxalato) phosphate (LiDFBOP) Octahedral arrangement Two F trans on P; two oxalate diligands on equator [13]
K3Al(C2O4)2F2.3H2O soluble [2]
[NH4]2VO2F(C2O4) [14]
[N(CH3)4]2VO2F(C2O4) [14]
Na2VO2F(C2O4) [14]
K2VO2F(C2O4) [14]
[NH4][Cr(H2O)2F2(C2O4)] green [15]
[NH4]3[Cr(C2O4)2F2]·5H2O green [16]
[NH4]3[Cr(C2O4)F4]·4H2O [16]
PyH[Cr(H2O)2F2(C2O4)] Py=pyridine green [15]
enH2[Cr(H2O)2F2(C2O4)]2. 2H2O en=ethylenediamine green [15]
[Cr(en)(H2O)2(C2O4)]2F. 2H2O en=ethylenediamine [15]
[Cr(en)2(C2O4)]2F. 2H2O en=ethylenediamine [15]
Na[Cr(H2O)2F2(C2O4)]. H2O green [15]
Na3[Cr(C2O4)2F2]·5H2O green [16]
Na3[Cr(C2O4)F4]·9H2O [16]
K[Cr(H2O)2F2(C2O4)] green; 2 water and two fluorides in cis position [15]
K3[Cr(C2O4)2F2]·5H2O green [16]
K3[Cr(C2O4)F4]·3H2O [16]
[NH4][MnF(C2O4)] pale pink [17]
[NH4]2Mn(C2O4)F3 pink; CAS 94138-08-6 [18]
pyH[MnF2(C2O4)(H2O)2] monoclinic I2/a a = 7.2260 b = 15.2398 c = 9.916 β = 98.22° Z = 4 Octahedral coordination on Mn, Cis-F opposite oxalate. 2 aqua is trans [19]
Na[MnF(C2O4)]·2H2O pale pink [17]
Na2Mn(C2O4)F3 pink; CAS 94138-06-4 [18]
Na2Mn2(C2O4)2.5F·2H2O triclinic P1 a = 7.9129 b = 8.8497 c = 8.9252 α = 74.623o β = 72.361 o γ = 78.193 o, Z = 2 birefringence 0.064@550 nm; light yellow [1]
K[MnF(C2O4)] pale pink [17]
K2Mn(C2O4)F3 pink; CAS 4138-07-5; [18]
Na2Fe(C2O4)F2 monoclinic C12/c1 a=15.8349 b=5.962 c=12.2784

β=111.968° Z=8

 1075.0 2.816 green [20]
[NH4]3[Fe(C2O4)2F2]·H2O [21]
[NH4][Fe(C2O4)F2]·3H2O [21]
Na[Fe(C2O4)F2]·2H2O [21]
Fe(phen)3(BF4)(C2O4BF2)∙H2O

phen = 1,10-phenanthroline

 tris(1,10-phenanthroline)-iron tetrafluoroborate [ethanedioato](difluoro)borate monohydrate orthorhombic Pca21 a=10.816 b=16.929 c=19.491 [22]
(imidH)2[Fe2(C2O4)F6] orthorhombic Pban a=9.143 b=20.837 c=3.890 Z=2 ladder, oxalate rungs [23]
[Fe2(C2O4)F4(DMSO)4] monoclinic P21/n a=7.259 b=11.409 c=13.374 β=97.26° Z=2 dimer, oxalate bridged [23]
Na3[Fe(C2O4)2F2]·4H2O light green [21]
KFe(C2O4)F orthorhombic Cmc21 a=7.7633 b=11.8767 c=10.4206 red or orange [24]
K[Fe(C2O4)F2]·2H2O yellowish green [21]
K2[Fe(C2O4)2F]·3H2O [21]
K3[Fe(C2O4)2F2]·2.8H2O light green [21]
Co(NH3)6Al(C2O4)2F2.3H2O orange yellow; insoluble [2]
[Co(NH3)6][Cr(C2O4)2F2]·6H2O pale green [16]
[Co(NH3)6][Cr(C2O4)F4]·4H2O pale green [16]
[Co(NH3)6][Cr(H2O)2F2(C2O4)]3. 2H2O yellowish-green; sparingly soluble [15]
[Co(en)3][Cr(C2O4)2F2]·7H2O pale green [16]
[Co(en)3][Cr(C2O4)F4]·3H2O pale green [16]
[Co(en)3][Cr(H2O)2F2(C2O4)]3. 3H2O yellowish green [15]
[Co(NH3)6][Fe(C2O4)F2]3·6H2O orange yellow [21]
[Co(en)3][Fe(C2O4)F2]3 orange yellow [21]
[Co(NH3)6]2[Fe(C2O4)2F]3·9H2O orange yellow [21]
[Co(en)3]2[Fe(C2O4)2F]3·4H2O orange yellow [21]
[Co(NH3)6][Ga(C2O4)2F2].3H2O insoluble [2]
Ni[Cr(H2O)2F2(C2O4)]2. 2H2O green [15]
Na2[GeF2(C2O4)2]·5.5H2O [25]
K2[GeF2(C2O4)2]·1.5H2O [25]
K2Ge(C2O4)2F2·2H2O [26]
Rb2VO2F(C2O4) [14]
Rb2Ge(C2O4)2F2·2H2O [26]
Rb2GeC2O4F4 [26]
[YF(C2O4)(H2O)2]·2H2O [27]
K4Zr(C2O4)3F2·3H2O [28]
Zr4O3F2(C2O4)4 · 2H2O [29]
K14Zr4 (C2O4)5F20·2H2O [28]
Na2ZrC2O4F4·2H2O [28]
Na2Zr2C2O4F8·4H2O [28]
K2ZrC2O4F4·2H2O [28]
KZr2(OH)3F2(C2O4)2 · 4H2O [29]
KZrF3C2O4 [30]
KZrF3C2O4 · 3H2O [29]
K2ZrF4C2O4 [30]
K2ZrF4C2O4 · 2H2O [29]
K3Zr(C2O4)2F3· 3H2O [28]
K3ZrF5C2O4 [29]
K4ZrF2(C2O4)3 ⋅ 2H2O [29]
K4Zr(C2O4)2CO3F2·5H2O [31]
Rb2ZrC2O4F4·2H2O [28]
Rb2Zr2C2O4F8·4H2O [28]
Rb3Zr(C2O4)2F3· 3H2O [28]
Na3[NbO(C2O4)2F2]·3H2O [32]
K3[NbO(C2O4)2F2]·3H2O [32]
K3[Nb(C2O4)3F2]·5H2O [32]
Rb3[NbO(C2O4)2F2]·3H2O [32]
Rb4[Mo2O4 (C2O4)2F2] orthorhombic a=1065 b=8.88 c=8.09 Z=2 3.52 [33]
In(C2O4)F. 3H2O [34]
NH4[In(C2O4)F2].2H2O [34]
Na[In(C2O4)F2].2H2O [34]
K[In(C2O4)F2].3H2O [34]
K2[InF3(C2O4)H2O] monoclinic P21/c a=7.6943 b=9.8135

c=7.7252 β=109.648 Z=4

 549.35 3.300 [35]
Rb2[InF3(C2O4)H2O] monoclinic P21/c a=7.8308 b=9.9671

c=7.9327 β=111.266 Z=4

 576.98 3.676 [35]
[Co(NH3)6][In(C2O4)2F2].2H2O [34]
[Sn(C2O4)F-][NH4+] monoclinic P21/c a = 8.2736 b = 9.6386 c = 7.7473 β = 111.229° Z = 4 [36]
NaSnC2O4F·H2O triclinic P1 a = 5.9880 b = 7.2468 c = 8.2925 α = 111.020°β = 107.986° γ = 96.873° Z=2 308.53 2.871 birefringence 0.189 @ 532 nm; colourless [1][37]
Na4Sn4(C2O4)3F6 triclinic P1 a = 6.0283 b = 8.7916 c = 9.1191 α = 69.486 β = 81.508 γ = 83.017 446.41 3.514 birefringence 0.160 @532 nm; colourless; Na 5 or 6 coordinated; Sn type 1: coordinates 2 F and 2 O's from oxalate, which bridges to another Sn type 1) Type 2 Sn has one bond to F, two bonds to Os from an oxalate, and another O from another oxalate. Sn also has weak bonds to other Sn [1][38]
KSn(C2O4)F monoclinic P21/c a = 8.0692 b = 9.5398 c = 7.7245 β= 111.600° Z=4 552.86 3.181 colourless [39]
K2[SnF2(C2O4)2] · 3H2O [25]
K2[SnF4(C2O4)] · 6.5H2O [25]
K2[Sn2F2(C2O4)6] · 2H2O [25]
K6[Sn2F4(C2O4)5] · 2H2O [25]
NH4Sb2(C2O4)F5 birefringence 0.111 @546 nm [1]
NH4Sb(C2O4)F2·H2O birefringence 0.381@546 [40]
(NH4)4Sb2(C2O4)3F4·2H2O monoclinic P21/n a= 8.6392 b=9.8051 c=11.7908 β=94.628° Z=2 995.52 2.308 birefringence 0.066 @546 [40]
(CN4H7)SbC2O4F2(H2O)0.5 birefringence 0.126 @546 nm [1]
Na2Sb2(C2O4)F6 birefringence 0.188 @546 nm [1]
KSb2C2O4F5 monoclinic P21/c a=5.8691 b=6.5124 c=22.178 β=91.893° Z=4 847.22 3.650 birefringence 0.170 @532 nm [41][1]
K2Sb2(C2O4)F6 birefringence 0.097 @546 nm [1]
RbSb2(C2O4)F5 orthorhombic P212121 a=5.9822 b=6.5652 c=22.7919 895.14 SHG 1.3×KDP; birefringence 0.09 @546 nm [42]
[C(NH2)3]3Sb(C2O4)2F2·2H2O triclinic P1 a=8.3223 b =11.0455 c=12.2379

α=69.660 β=76.132 γ=69.725 Z=2

 980.32 1.870 birefringence 0.251@546nm [40]
[C(NH2)3]Sb(C2O4)F2·H2O birefringence 0.323 @546 nm [1]
Cs2Ge(C2O4)2F2·H2O [26]
Cs2GeC2O4F4 [26]
Cs2VO2F(C2O4)
Cs2ZrC2O4F4·2H2O [28]
Cs2Zr2C2O4F8·4H2O [28]
Cs4[Mo2O4 (C2O4)2F2] orthorhombic a=10.72 b=9.80 c=7.95 Z=2 3.98 [33]
Cs2Sb2(C2O4)2F4∙H2O birefringence 0.325@546 [1]
Lanthanum fluorooxalate ?? [43]
Neodymium fluorooxalate ?? [43]
[TbrF(C2O4)(H2O)2]·2H2O [27]
?[DyF(C2O4)(H2O)2]·2H2O Dysprosium fluorooxalate C2/c a=12.0047 b=11.0842 =8.2182 β=129.021° [43][44]
[HoF(C2O4)(H2O)2]·2H2O Holmium fluorooxalate [43]
[ErF(C2O4)(H2O)2]·2H2O orthorhombic a=11.217 b=13.046 c=9.191 Z=6 [27][45]
[TmF(C2O4)(H2O)2]·2H2O [27]
[YBF(C2O4)(H2O)2]·2H2O [27]
[LuF(C2O4)(H2O)2]·2H2O [27]
K4Hf(C2O4)3F2·3H2O [28]
K14Hf4(C2O4)5F20·2H2O [28]
K3Hf(C2O4 2F3· 3H2O [28]
Rb3Hf(C2O4 2F3· 3H2O [28]
K4Hf(C2O4)2CO3F2·5H2O water soluble and stable [31]
H2[(C2O4)(OH)3Re·O·Re(OH)3F2] brown
[NH4]2[(C2O4)(OH)3Re·O·Re(OH)3F2] brown
[Co(NH3)6]2[(C2O4)(OH)3Re·O·Re(OH)3F2]3 yellowish brown [46]
[Co en3]2[(C2O4)(OH)3Re·O·Re(OH)3F2]3 yellowish brown [46]
K2[(C2O4)(OH)3Re·O·Re(OH)3F2] brown
Ni[(C2O4)(OH)3Re·O·Re(OH)3F2] brown [46]
Ba[(C2O4)(OH)3Re·O·Re(OH)3F2] brown [46]
Tl2[(C2O4)(OH)3Re·O·Re(OH)3F2] brown [46]
(UF2)C2O4 · 11/2H2O [47]
(UF)2(C2O4)3 [47]
UF3(H2O)(C2O4)0.5 monoclinic C2/c a = 17.246, b = 6.088 c = 8.589 β = 95.43° Z = 8 Light green

UIV tricapped trigonal prism coordination (9 fold); each U coordinates 6 bridging fluoride, one water, and two oxalates, which bridge to 3 other U atoms. One oxalate O is in the capped position, and the other 2 O are all on the common face.

 [48]
(H4TREN)[U2F6(C2O4)3]·4H2O

(TREN = tris(2-aminoethyl)amine)

 monoclinic P21/c a = 19.1563, b = 8.9531 c = 16.6221 β = 114.633° Z = 4 2591.4 2.759 green [49]
(H4APPIP)[U2F6(C2O4)3]·4H2O (APPIP = 1,4-bis(3-amino-propyl)piperazine) monoclinic P21/c a = 10.3309 b = 15.564 c = 17.537 β = 95.430° Z=4 2807.1 2.675 green [49]
Na3[UO2(C2O4)F3]⋅4H2O orthorhombic Pnnm a=7.9967 b=21.092 c=7.252 Z=4 1223.2 3.020 yellow [50]
Na3[UO2(C2O4)F3]⋅6H2O triclinic α°β°γ° [50]
K3[UO2(C2O4)F3] triclinic P1 a=9.682 b=10.274 c=10.612 α=104.008° β=97.041° γ=108.774° Z=4 946.4 3.736 yellow [50]
K3[UO2(C2O4)2F]⋅3H2O triclinic P1 a=6.6530 b=9.105 c=12.120 α=96.372° β=90.714° γ=93.193° Z=2 728.4 2.902 [50]
Cs[UO2(C2O4)F]⋅H2O monoclinic P21 a=5.4954 b=16.226 c=9.6277 β=98.509° Z=4 849.0 4.130 yellow [50]
K2[UO2F2(C2O4)] triclinic P1 a=10.981 b=11.038 c=12.629 α=108.00° β=86.79° γ=123.99° 1.31 yellow [51]
K4[UO2F2(C2O4)2] triclinic P1 a=8.768 b=8.777 c=14.857 α=101.58° β=114.27° γ=85.27° 4.16 yellow [51]
K2[(UO2)2F4(C2O4)] monoclinic a=10.792 b=12.028 c=10.615 β=136.88° 2.92 yellow; oxalate is tetradentate, bridging 2 U [51]
Rb2[UO2F2(C2O4)] yellow [51]
Rb4[UO2F2(C2O4)2] yellow [51]
Rb2[(UO2)2F4(C2O4)] yellow [51]
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