B i s (cyclopentadienyl) t i t a n i u m d i c h l o r ide, when created w i t h 2.3-dihydroxypyridine and 2-a1nino-3-hydroxypyridine i n aqueous medium, forms s o l u b l e i o n i c d e r i v a t i v e s of t h e type [ ( Q J )~T~L ] +Cl-(HL = 2, 3-dihydroxypyridine or 2-amino-3-hydroxy p y r i d i n e ) . These two complexes r e a c t with xanthate anions i n aqueous s o l u t i o n giving i o n i c complexes of t h e type [(Cp)2TLl+ROCS2-, where R= M e , E t o r p r . The l a t t e r complexes have been c h a r a c t e r i s e d b y elemental analyses, conductance measurements, e l e c t r o n i c , I R and PMR s p e c t r a l s t u d i e s .
A study on the misconceptions developed or held by teachers related to the two terms valence and valency was undertaken. A total of 48 teachers (26 males and 22 females) teaching the chemistry component of science subject to 14- to 16-year-old students, in 48 schools affiliated to one district, were randomly selected for the study by taking one teacher from each school. One session was devoted for administering the questionnaire among the teachers and second session (with a gap of one day) was for addressing the teacher’s misconceptions. From the analysis of the responses, it was found that the two terms although they have the same meaning were misconceived as having different meanings. Due to this a misleading relationship between the two terms was discovered. Even the highest numerical value of valence was misconceived. The possible reasons for these misconceptions were identified. A simple, brief, and precise description of the concepts was presented to remove the misconceptions of the teachers.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.