PMID- 12665365
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20031008
LR  - 20030331
IS  - 0020-1669 (Print)
IS  - 0020-1669 (Linking)
VI  - 42
IP  - 7
DP  - 2003 Apr 7
TI  - Structure and magnetic properties of tetraarylporphinatomagnesium(II) electron 
      transfer salts of 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane, TCNQF4.
PG  - 2311-22
AB  - The crystal structures of the 
      2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane, TCNQF(4), electron transfer 
      salts of meso-tetraphenylporphinatomagnesium(II), [MgTPP][TCNQF(4)].PhMe and 
      [MgTPP][TCNQF(4)].3(1,2-C(6)H(4)Cl(2)), and 
      meso-tetrakis(3,4,5-trimethoxyphenyl)porphinatomagnesium(II), 
      [MgT(3,4,5-OMe)PP][TCNQF(4)].3(1,2-C(6)H(4)Cl(2)), provide the first structurally 
      characterized examples of 1-D metal-radical chains involving 
      [Mg(II)(porphyrin(*))](+). These salts possess [TCNQF(4)](*-) stabilized by 
      trans-mu-coordination to Mg(II) and exhibit nu(CN) at 2199 and 2177, 2212 and 
      2187, and 2194 and 2172 cm(-1), respectively. The [TCNQF(4)](*-) species is 
      planar and bridges two cations with MgN distances of 2.266(16), 2.221(2), and 
      2.276(3) A, respectively, which are shorter than the MnN 2.321(3) A distance 
      observed for [MnT(3,4,5-OMe)PP][TCNQF(4)].3(1,2-C(6)H(4)Cl(2)). The 
      room-temperature effective moments for [MgTPP][TCNQF(4)].xS (S = PhMe and 
      1,2-C(6)H(4)Cl(2)) and [MgTPP][C(4)(CN)(6)].PhMe are consistent with the 
      calculated spin only value of 2.45 micro(B) with weak antiferromagnetic coupling 
      (J(intra)/k(B) approximately -2.9 K; H = -2JSa.Sb) for these [TCNQF(4)](*-) salts 
      and for this [C(4)(CN)(6)](*-) salt (J(intra)/k(B) approximately -0.8 K) on the 
      basis of fits to several models. The coupling is significantly reduced with 
      respect to that of the Mn analogues due to lack of spin on the metal site for 
      [Mg(II)(por(*))](+). The antiferromagnetic coupling is enhanced for 
      [MgT(3,4,5-OMe)PP][TCNQF(4)] with respect to [MgTPP][TCNQF(4)] as [TCNQF(4)](*-) 
      gets closer to the [Mg(II)(por(*))](+) plane, which leads to greater interactions 
      and coupling.
FAU - Hibbs, Wendy
AU  - Hibbs W
AD  - Department of Chemistry, University of Utah, 315 S. 1400 East RM 2020, Salt Lake 
      City, Utah 84112-0850, USA.
FAU - Arif, Atta M
AU  - Arif AM
FAU - Botoshansky, Mark
AU  - Botoshansky M
FAU - Kaftory, Menahem
AU  - Kaftory M
FAU - Miller, Joel S
AU  - Miller JS
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Inorg Chem
JT  - Inorganic chemistry
JID - 0366543
EDAT- 2003/04/01 05:00
MHDA- 2003/04/01 05:01
CRDT- 2003/04/01 05:00
PHST- 2003/04/01 05:00 [pubmed]
PHST- 2003/04/01 05:01 [medline]
PHST- 2003/04/01 05:00 [entrez]
AID - 10.1021/ic020494w [doi]
PST - ppublish
SO  - Inorg Chem. 2003 Apr 7;42(7):2311-22. doi: 10.1021/ic020494w.