The crystal and molecular structure of 5,6-dihydro-2-thiouracil, C4H6N2OS

Crystal and molecular structures of 4-aryl-1,4-dihydropyrimidines: Novel calcium channel antagonists

“…The bond lengths and angles about the molecular framework common to the three structures are similar. The values of these parameters also agree with those reported for other 1,4-dihydropyrimidine calcium channel antagonists and related compounds [17][18][19][20][21][22]. Because of conjugation of the dihydropyrimidine ring, the bond lengths N1--C6 and N5--C6 are shorter than N1--C2 and N5--C4.…”

Experimental study on the thermochemistry of 2-thiouracil, 5-methyl-2-thiouracil and 6-methyl-2-thiouracil

“…In heterocyclic compounds the sulphur atom can also act as a hydrogen-bond acceptor [58]. Because of its reduced electro negativity, a S atom should be a weaker hydrogen-bond acceptor than an O atom [59].…”

A new antimetabolite, 5-morpholinomethyl-2-thiouracil—spectral properties, thermal profiles, antibacterial, antifungal and antitumour studies of some of its metal chelates

“…There are two pseudo-symmetric molecules with two water oxygens and two chlorides in the asymmetric unit. Table S1 (ESI) compares the bond lengths of MMTU with those of 5,6-dihydro-2thiouracil, 43 5,6-dihydrouracil, 44 2,4-dithiouracil, 45 uracil 46 and 6-amino-2-thiouracil monohydrate. 47 The C( 5 47 The valence angles at N1 and N3 are larger than 120Њ and these N atoms have extra-annular H atoms, in accordance with observations cited elsewhere.…”