SYNTHESIS, STRUCTURE AND PHYSICAL-PROPERTIES OF TETRATHIAFULVALENIUM SALTS OF THE FERRACARBORANE COMPLEX COMMO-[3,3'-FE(1-(C4H3S)-1,2-C2B9H10)(2)]

被引：14

作者：

YAN, YK

MINGOS, MP

KURMOO, M

LI, WS

SCOWEN, IJ

MCPARTLIN, M

COOMBER, AT

FRIEND, RH

机构：

[1] UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, DEPT CHEM, LONDON SW7 2AY, ENGLAND

[2] UCL ROYAL INST GREAT BRITAIN, LONDON W1X 4BS, ENGLAND

[3] UNIV N LONDON, SCH APPL CHEM, LONDON N7 8DB, ENGLAND

[4] UNIV CAMBRIDGE, CAVENDISH LAB, CAMBRIDGE CB3 0HE, ENGLAND

来源：

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1995年 / 17期

关键词：

D O I：

10.1039/dt9950002851

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The sandwich complex commo-[3,3'-fe{1-(C(4)H(3)S)-1.2-C(2)B(9)H(10)}(2)](-)1 and its tetrathiafulvalenium salts [ttf](5)[Fe(C(2)B(9)H(10)C(4)H(3)S)(2)] 2 and [ttf] [Fe(C(2)B(9)H(10)C(4)H(3)S)(2)] 3 were synthesised in order to study the effect of the thiophene:(C(4)H(3)S) group on the crystal packing, electrical and magnetic properties of ttf-metallacarborane salts. The crystal structure of 2 features unusual two-dimensional networks of ttf units which extend in the a and c directions. Each ttf sheet contains stacked trimers of ttf units, which propagate along the a direction, and bridging ttf units, which lie between the ttf stacks approximately orthogonally to the ttf units within the trimers. The trimers are linked along the c direction via short S ... S contacts (3.56 Angstrom) with these bridging ttf units. In contrast, the crystal structure of compound 3 contains discrete stacked dimers of [ttf](.+) cations. Whilst crystals of 2 are semiconducting (sigma(300K) = 2 x 10(-3) S cm(-1)) with an activation;energy of 0.22 eV, those of 3 are insulating (sigma(290K) less than or equal to 10(-7) S cm(-1)). Both compounds exhibit weak ferromagnetic interactions between the unpaired spins of their [Fe(C(2)B(9)H(10)C(4)H(3)S)(2)](-) anions, with small positive Weiss constants of 1.9 and 0.5 K respectively.

引用

页码：2851 / 2860

页数：10

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