Spin transition centres linked by the nitroprusside ion. the cooperative transition in bis(2,6-bis(pyrazol-3-yl)-pyridine)iron(II) nitroprusside

Kristian H. Sugiyarto; Wendy Anne McHale; Donald C. Craig; A. David Rae; Marcia L. Scudder; Harold A. Goodwin

doi:10.1039/b301218b

Spin transition centres linked by the nitroprusside ion. the cooperative transition in bis(2,6-bis(pyrazol-3-yl)-pyridine)iron(II) nitroprusside

Kristian H. Sugiyarto, Wendy Anne McHale, Donald C. Craig, A. David Rae, Marcia L. Scudder, Harold A. Goodwin^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

61 Citations (Scopus)

Abstract

The complex [Fe(3-bpp)₂][Fe(CN)₅(NO)] (3-bpp = 2,6-bis(pyrazol-3-yl)pyridine) undergoes an abrupt, thermally-induced ¹A₁ ↔ ⁵T₂ spin transition associated with a narrow (∼3 K) hysteresis loop (T_1/2↓ = 181 K; T_1/2 = ↑ 84 K). The transition is accompanied by a change in crystallographic space group (P4/ncc at 294 K; Pnca at 100 K) along with a change in the average Fe-N distance of 0.21 Å. The complex cation and anion are linked by hydrogen bonding involving each of the four pyrazolyl-NH moieties of each complex cation and the four equatorial cyano groups of each anion, resulting in layers of 4,4-nets. The hydrogen bonding remains essentially the same in both phases but the relative orientations of the cations and anions change significantly to allow for the change in the dimensions of the complex cation, accounting for the cooperativity associated with the spin change.

Original language	English
Pages (from-to)	2443-2448
Number of pages	6
Journal	Dalton Transactions
Issue number	12
DOIs	https://doi.org/10.1039/b301218b
Publication status	Published - 21 Jun 2003

Access to Document

10.1039/b301218b

Cite this

@article{5d2f07c9431f4c35841e91093b8f8f5a,

title = "Spin transition centres linked by the nitroprusside ion. the cooperative transition in bis(2,6-bis(pyrazol-3-yl)-pyridine)iron(II) nitroprusside",

abstract = "The complex [Fe(3-bpp)2][Fe(CN)5(NO)] (3-bpp = 2,6-bis(pyrazol-3-yl)pyridine) undergoes an abrupt, thermally-induced 1A1 ↔ 5T2 spin transition associated with a narrow (∼3 K) hysteresis loop (T1/2↓ = 181 K; T1/2 = ↑ 84 K). The transition is accompanied by a change in crystallographic space group (P4/ncc at 294 K; Pnca at 100 K) along with a change in the average Fe-N distance of 0.21 {\AA}. The complex cation and anion are linked by hydrogen bonding involving each of the four pyrazolyl-NH moieties of each complex cation and the four equatorial cyano groups of each anion, resulting in layers of 4,4-nets. The hydrogen bonding remains essentially the same in both phases but the relative orientations of the cations and anions change significantly to allow for the change in the dimensions of the complex cation, accounting for the cooperativity associated with the spin change.",

author = "Sugiyarto, {Kristian H.} and McHale, {Wendy Anne} and Craig, {Donald C.} and Rae, {A. David} and Scudder, {Marcia L.} and Goodwin, {Harold A.}",

year = "2003",

month = jun,

day = "21",

doi = "10.1039/b301218b",

language = "English",

pages = "2443--2448",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

number = "12",

}

TY - JOUR

T1 - Spin transition centres linked by the nitroprusside ion. the cooperative transition in bis(2,6-bis(pyrazol-3-yl)-pyridine)iron(II) nitroprusside

AU - Sugiyarto, Kristian H.

AU - McHale, Wendy Anne

AU - Craig, Donald C.

AU - Rae, A. David

AU - Scudder, Marcia L.

AU - Goodwin, Harold A.

PY - 2003/6/21

Y1 - 2003/6/21

N2 - The complex [Fe(3-bpp)2][Fe(CN)5(NO)] (3-bpp = 2,6-bis(pyrazol-3-yl)pyridine) undergoes an abrupt, thermally-induced 1A1 ↔ 5T2 spin transition associated with a narrow (∼3 K) hysteresis loop (T1/2↓ = 181 K; T1/2 = ↑ 84 K). The transition is accompanied by a change in crystallographic space group (P4/ncc at 294 K; Pnca at 100 K) along with a change in the average Fe-N distance of 0.21 Å. The complex cation and anion are linked by hydrogen bonding involving each of the four pyrazolyl-NH moieties of each complex cation and the four equatorial cyano groups of each anion, resulting in layers of 4,4-nets. The hydrogen bonding remains essentially the same in both phases but the relative orientations of the cations and anions change significantly to allow for the change in the dimensions of the complex cation, accounting for the cooperativity associated with the spin change.

AB - The complex [Fe(3-bpp)2][Fe(CN)5(NO)] (3-bpp = 2,6-bis(pyrazol-3-yl)pyridine) undergoes an abrupt, thermally-induced 1A1 ↔ 5T2 spin transition associated with a narrow (∼3 K) hysteresis loop (T1/2↓ = 181 K; T1/2 = ↑ 84 K). The transition is accompanied by a change in crystallographic space group (P4/ncc at 294 K; Pnca at 100 K) along with a change in the average Fe-N distance of 0.21 Å. The complex cation and anion are linked by hydrogen bonding involving each of the four pyrazolyl-NH moieties of each complex cation and the four equatorial cyano groups of each anion, resulting in layers of 4,4-nets. The hydrogen bonding remains essentially the same in both phases but the relative orientations of the cations and anions change significantly to allow for the change in the dimensions of the complex cation, accounting for the cooperativity associated with the spin change.

UR - http://www.scopus.com/inward/record.url?scp=1842617334&partnerID=8YFLogxK

U2 - 10.1039/b301218b

DO - 10.1039/b301218b

M3 - Article

SN - 1477-9226

SP - 2443

EP - 2448

JO - Dalton Transactions

JF - Dalton Transactions

IS - 12

ER -

Spin transition centres linked by the nitroprusside ion. the cooperative transition in bis(2,6-bis(pyrazol-3-yl)-pyridine)iron(II) nitroprusside

Abstract

Access to Document

Other files and links

Fingerprint

Cite this