Tetrakis(acetonitrile)copper(I) tetrafluoroborate

Tetrakis(acetonitrile)copper(I) tetrafluoroborate
Identifiers
CAS Number	15418-29-8;
3D model (JSmol)	Interactive image;
ChemSpider	9165868;
EC Number	672-614-2;
PubChem CID	10990673;
CompTox Dashboard (EPA)	DTXSID80451051 ;
	InChI InChI=1S/4C2H3N.BF4.Cu/c41-2-3;2-1(3,4)5;/h41H3;;/q;;;;-1;+1 Key: YZGSKMIIVMCEFE-UHFFFAOYSA-N;
	SMILES [B-](F)(F)(F)F.CC#N.CC#N.CC#N.CC#N.[Cu+];
Properties
Chemical formula	C8H12BCuF4N4
Molar mass	314.56 g·mol−1
Hazards
	GHS labelling:[1]
Pictograms
Signal word	Danger
Hazard statements	H314
Precautionary statements	P260, P264, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P363, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Tetrakis(acetonitrile)copper(I) tetrafluoroborate is a complex compound of copper with acetonitrile as the ligand and tetrafluoroborate as the counterion.

Preparation

Tetrakis(acetonitrile)copper(I) tetrafluoroborate can be prepared starting from nitrosyl tetrafluoroborate according to the following equation:

Cu + NOBF₄ + 4 CH₃CN → [Cu(CH₃CN)₄]BF₄ + NO

The conversion appears to occur in two stages, initially producing a green-blue copper(II) complex. This complex is reduced to the colorless copper(I) complex by further treatment with metallic copper.^[1]

Properties

Tetrakis(acetonitrile)copper(I) tetrafluoroborate forms colorless crystals in the orthorhombic crystal system in the space group Pna21 with the lattice parameters a = 23.882 Å; b = 8.3285 Å; c = 20.338 Å, and twelve unit cells. The compound is isomorphous with tetrakis(acetonitrile)copper(I) perchlorate and tetrakis(acetonitrile)silver(I) perchlorate.^[2]

Reactions

Tetrakis(acetonitrile)copper(I) tetrafluoroborate reacts with methoxyisobutyl isonitrile to produce tetrakis(methoxyisobutylisonitrile)copper(I) tetrafluoroborate:^[3]

[Cu(CH₃CN)₄]BF₄ + 4 CH₃O(CH₃)₂CCH₂NC → [Cu(CH₃O(CH₃)₂CCH₂NC)₄]BF₄ + 4 CH₃CN

[Cu(CH₃O(CH₃)₂CCH₂NC)₄]BF₄ is used to produce technetium(^99mTc)-sestamibi, which is of commercial value.^[4]

References

^ B. J. Hathaway, D. G. Holah, J. D. Postlethwaite (1961), "The preparation and properties of some tetrakis(methylcyanide)copper(I) complexes", Journal of the Chemical Society (Resumed), p. 3215, doi:10.1039/jr9610003215{{citation}}: CS1 maint: multiple names: authors list (link)
^ P. G. Jones, O. Crespo (1998-01-15), "Tetrakis(acetonitrile- N )copper(I) Tetrafluoroborate", Acta Crystallographica Section C Crystal Structure Communications, vol. 54, no. 1, pp. 18–20, Bibcode:1998AcCrC..54...18J, doi:10.1107/S0108270197013322
^ Te-Wei Lee, Chang-Shinn Su, Gann Ting (February 1996), "Synthesis, reactivity and 99mTc labelling of 2-alkoxyisobutylisonitrile", Applied Radiation and Isotopes, vol. 47, no. 2, pp. 207–210, doi:10.1016/0969-8043(95)00249-9{{citation}}: CS1 maint: multiple names: authors list (link)
^ M. E. Wilson, J. C. Hung, R. J. Gibbons (July 1993), "An alternative method for rapid preparation of 99Tcm-sestamibi", Nuclear Medicine Communications, vol. 14, no. 1, pp. 544–549, doi:10.1097/00006231-199307000-00005{{citation}}: CS1 maint: multiple names: authors list (link)

[1] B. J. Hathaway, D. G. Holah, J. D. Postlethwaite (1961), "The preparation and properties of some tetrakis(methylcyanide)copper(I) complexes", Journal of the Chemical Society (Resumed), p. 3215, doi:10.1039/jr9610003215{{citation}}: CS1 maint: multiple names: authors list (link)

[2] P. G. Jones, O. Crespo (1998-01-15), "Tetrakis(acetonitrile- N )copper(I) Tetrafluoroborate", Acta Crystallographica Section C Crystal Structure Communications, vol. 54, no. 1, pp. 18–20, Bibcode:1998AcCrC..54...18J, doi:10.1107/S0108270197013322

[3] Te-Wei Lee, Chang-Shinn Su, Gann Ting (February 1996), "Synthesis, reactivity and 99mTc labelling of 2-alkoxyisobutylisonitrile", Applied Radiation and Isotopes, vol. 47, no. 2, pp. 207–210, doi:10.1016/0969-8043(95)00249-9{{citation}}: CS1 maint: multiple names: authors list (link)

[4] M. E. Wilson, J. C. Hung, R. J. Gibbons (July 1993), "An alternative method for rapid preparation of 99Tcm-sestamibi", Nuclear Medicine Communications, vol. 14, no. 1, pp. 544–549, doi:10.1097/00006231-199307000-00005{{citation}}: CS1 maint: multiple names: authors list (link)

[1]

[2]

[3]

[4]

Preparation

Properties

Reactions

See also

References