The terminal formate complex [(OCHO)Ti(N3N)] (3) containing the trianionic triamido-amine ligand (Me3SiNCH2CH2)3N3- (N3N) was prepared via salt metathesis of [ClTi(N3N)] (1) with sodium formate or alternatively by treatment of the alkyl complex [nBuTi(N3N)] (2) with ammonium formate [HNEt3][OCHO]. Deprotonation of 3 with potassium hexamethyldisilazide gave a polymeric helical chain of the oxo c...

Microbiological evidence (1) first implicated folic acid in nucleic acid synthesis, and several lines of investigation suggest that citrovorum factor, or another derivative of folic acid, may function in some manner as a coenzyme in the metabolism of a l-carbon moiety. The function of the formy1 group in rhizopterin (2) and citrovorum factor (3) has not been clarified. The incorporation of form...

In the crystal structure of the title compound, poly[tri-μ-formato-cobalt(II)potassium], [CoK(CHO(2))(3)](n) the Co(2+) cations are coordinated by six O-bonded formate anions in an octa-hedral coordination mode and the K(+) cations are eightfold coordinated by seven O-bonded formate anions within irregular polyhedra. The Co(2+) cations are connected by bridging formate anions into a three-dimen...

Direct interspecies electron transfer (DIET) is an alternative to interspecies H(2)/formate transfer as a mechanism for microbial species to cooperatively exchange electrons during syntrophic metabolism. To understand what specific properties contribute to DIET, studies were conducted with Pelobacter carbinolicus, a close relative of Geobacter metallireducens, which is capable of DIET. P. carbi...

Formate (l), serine (2)) formaldehyde (3), and methionine (4) each can serve as the donor of the carbon atom for the biosynthesis of the methyl group of DNA’-thymine. The utilization of formate for the biosynthesis of DNA in vitro has been reported previously (5-g), and in most instances the uptake of formate carbon under these conditions has been primarily into the methyl group of thymine (5)....

GAR transformylase, which is responsible for the incorporation of formate carbon into what becomes position 8 of the purine ring, has been completely separated from 5-amino-4-imidazolecarboxamide ribotide transformylase (3). The latter enzyme is responsible for the incorporation of formate carbon into position 2 of the purine ring. The requirement for folic acid compounds has been demonstrated ...

This paper reports on a single alkaline exchange membrane direct formate fuel cell (AEM DFFC) consisting of a carbon-supported palladium catalyst at the anode, a quaternized polysulfone membrane, and a non-precious Fe–Co catalyst at the cathode. It is demonstrated that the AEM DFFC yields a peak power density of 130 mW cm 2 with 5 M potassium formate (HCOOK) at 80 C. It is further shown that wi...