TY - JOUR
T1 - Trapping tetramethoxyzincate and -cobaltate(II) between Mo24+ units
AU - Cotton, F. Albert
AU - Liu, Chun Y.
AU - Murillo, Carlos A.
AU - Wang, Xiaoping
PY - 2003/7/28
Y1 - 2003/7/28
N2 - Two compounds of a new type, [Mo2](CH3O)2M(CH 3O)2[Mo2] where [Mo2] is an abbreviation for Mo2[(p-MeOC6H4)- NCHN(p-MeOC6H4)]3 and M = Zn (1) and Co (2), are reported. Discrete [M(OR)4]2- ions, either as such or in the μ2,η4 role, have not heretofore been described. In these compounds they have distorted tetrahedral structures and bridge two [Mo2] groups in much the same way as did SO42-, MoO42-, and WO42- ions in other recently reported compounds (Cotton, F. A.; Donahue, J. P.; Murillo, C. A. Inorg. Chem. 2001, 40, 2229). The 1H NMR spectrum of 1 and the visible spectrum and magnetic properties of 2 are consistent with these structures. The M(OCH3)4 bridges are moderately effective in coupling the two [Mo2] redox centers. Compounds 1 and 2 may also be viewed as having Zn∥ and Co∥ centers tetrahedrally coordinated by the bidentate ligand [Mo2[(p-MeOC6H4)NCHN (p-MeOC6H4)]3- (OMe)2]-. From that point of view they may be compared with Zn(DPM)2 and Co(DPM)2 (3), where DPM is the anion of dipivaloylmethane. For purposes of comparison, 3 has been fully characterized structurally, spectroscopically, and magnetically. Close analogies between 2 and 3 are shown to exist.
AB - Two compounds of a new type, [Mo2](CH3O)2M(CH 3O)2[Mo2] where [Mo2] is an abbreviation for Mo2[(p-MeOC6H4)- NCHN(p-MeOC6H4)]3 and M = Zn (1) and Co (2), are reported. Discrete [M(OR)4]2- ions, either as such or in the μ2,η4 role, have not heretofore been described. In these compounds they have distorted tetrahedral structures and bridge two [Mo2] groups in much the same way as did SO42-, MoO42-, and WO42- ions in other recently reported compounds (Cotton, F. A.; Donahue, J. P.; Murillo, C. A. Inorg. Chem. 2001, 40, 2229). The 1H NMR spectrum of 1 and the visible spectrum and magnetic properties of 2 are consistent with these structures. The M(OCH3)4 bridges are moderately effective in coupling the two [Mo2] redox centers. Compounds 1 and 2 may also be viewed as having Zn∥ and Co∥ centers tetrahedrally coordinated by the bidentate ligand [Mo2[(p-MeOC6H4)NCHN (p-MeOC6H4)]3- (OMe)2]-. From that point of view they may be compared with Zn(DPM)2 and Co(DPM)2 (3), where DPM is the anion of dipivaloylmethane. For purposes of comparison, 3 has been fully characterized structurally, spectroscopically, and magnetically. Close analogies between 2 and 3 are shown to exist.
UR - http://www.scopus.com/inward/record.url?scp=0038637364&partnerID=8YFLogxK
U2 - 10.1021/ic034167f
DO - 10.1021/ic034167f
M3 - Article
AN - SCOPUS:0038637364
SN - 0020-1669
VL - 42
SP - 4619
EP - 4623
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 15
ER -