Synthesis and magnetic properties of the novel dithiadiazolyl radical, p-NCC6F4C6F4CNSSN

被引：30

作者：

Alberola, A

Less, RJ

Palacio, F

Pask, CM

Rawson, JM

机构：

[1] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

[2] Univ Zaragoza, CSIC, ICMA, E-50009 Zaragoza, Spain

来源：

MOLECULES | 2004年 / 9卷 / 09期

关键词：

magnetic properties; dithiadiazolyl; molecular magnetism; organic magnet;

D O I：

10.3390/90900771

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The dithiadiazolyl radical P-Ncc(6)F(4)C(6)F(4)CNSSN. (4) retains its monomeric nature in the solid state with molecules linked together into chains via supramolecular CN.. S interactions. Variable temperature magnetic studies on 4 show that it behaves as a near-ideal Curie paramagnet (\theta\ less than 0.1 K), indicating negligible intermolecular exchange. The effective magnetic moment (1.78 mu(B)) is temperature independent and in excellent agreement with the value expected for an S = 1/2 paramagnet with g = 2.01 (1.74mu(B)). The lack of exchange coupling between radicals is attributed to the absence of significant orbital overlap between radical centres.

引用

页码：771 / 781

页数：11

共 21 条

[1] A thiazyl-based organic ferromagnet [J].

Alberola, A ;

Less, RJ ;

Pask, CM ;

Rawson, JM ;

Palacio, F ;

Oliete, P ;

Paulsen, C ;

Yamaguchi, A ;

Farley, RD ;

Murphy, DM .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (39) :4782-4785

[2] A CW-EPR and ESEEM spectroscopic study of the dithiadiazolyl radicals p-XC6F4CNSSN (X = CN, Br) [J].

Alonso, PJ ;

Antorrena, G ;

Martínez, JI ;

Novoa, JJ ;

Palacio, F ;

Rawson, JM ;

Smith, JNB .

APPLIED MAGNETIC RESONANCE, 2001, 20 (1-2) :231-247

[3] The neutral diradical 5,5′-bis(1,3,2,4-dithiadiazolyl) [SNSNC-CNSNS], the first main group radical to exhibit a dramatic increase in paramagnetism on mechanical grinding [J].

Antorrena, G ;

Brownridge, S ;

Cameron, TS ;

Palacio, F ;

Parsons, S ;

Passmore, J ;

Thompson, LK ;

Zarlaida, F .

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 2002, 80 (11) :1568-1583

[4] A novel paramagnetic dithiadiazolyl radical:: Crystal structure and magnetic properties of p-BrC6F4CNSSN• [J].

Antorrena, G ;

Davies, JE ;

Hartley, M ;

Palacio, F ;

Rawson, JM ;

Smith, JNB ;

Steiner, A .

CHEMICAL COMMUNICATIONS, 1999, (15) :1393-1394

[5] THE FIRST SOLID-STATE PARAMAGNETIC 1,2,3,5-DITHIADIAZOLYL RADICAL - X-RAY CRYSTAL-STRUCTURE OF [P-NCC6F4CNSSN]CENTER-DOT [J].

BANISTER, AJ ;

BRICKLEBANK, N ;

CLEGG, W ;

ELSEGOOD, MRJ ;

GREGORY, CI ;

LAVENDER, I ;

RAWSON, JM ;

TANNER, BK .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1995, (06) :679-680

[6] Spontaneous magnetization in a sulfur-nitrogen radical at 36 K [J].

Banister, AJ ;

Bricklebank, N ;

Lavender, I ;

Rawson, JM ;

Gregory, CI ;

Tanner, BK ;

Clegg, W ;

Elsegood, MRJ ;

Palacio, F .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1996, 35 (21) :2533-2535

[7] POLYFLUOROARENES .17. SOME REACTIONS OF PENTAFLUOROBENZONITRILE [J].

BIRCHALL, JM ;

HASZELDINE, RN ;

JONES, ME .

JOURNAL OF THE CHEMICAL SOCIETY C-ORGANIC, 1971, (07) :1343-+

[8] MONOFUNCTIONAL AND DIFUNCTIONAL FURAN-BASED 1,2,3,5-DITHIADIAZOLYL RADICALS - PREPARATION AND SOLID-STATE STRUCTURES OF 2,5-[(S2N2C)OC4H2(CN2S2)] AND 2,5-[(S2N2C)OC4H2(CN)] [J].

CORDES, AW ;

CHAMCHOUMIS, CM ;

HICKS, RG ;

OAKLEY, RT ;

YOUNG, KM ;

HADDON, RC .

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 1992, 70 (03) :919-925

[9] PREPARATION AND SOLID-STATE STRUCTURES OF (CYANOPHENYL)DITHIADIAZOLYL AND (CYANOPHENYL)DISELENADIAZOLYL RADICALS [J].

CORDES, AW ;

HADDON, RC ;

HICKS, RG ;

OAKLEY, RT ;

PALSTRA, TTM .

INORGANIC CHEMISTRY, 1992, 31 (10) :1802-1808

[10] ELECTRON-SPIN-RESONANCE SPECTROSCOPY OF CF3CNSSN. AND C6F5CNSSN. FREE-RADICALS [J].

FAIRHURST, SA ;

SUTCLIFFE, LH ;

PRESTON, KF ;

BANISTER, AJ ;

PARTINGTON, AS ;

RAWSON, JM ;

PASSMORE, J ;

SCHRIVER, MJ .

MAGNETIC RESONANCE IN CHEMISTRY, 1993, 31 (11) :1027-1030

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