Compound sentence

Each subject in a compound sentence must have the proper verb and auxiliary verb. 

In compound sentences containing coordinating conjunctions, the clause following the conjunction is punctuated as if it were alone. 

A COMPOUND SENTENCE Contains two (or more) simple sentences of equal importance joined by words like and and... 

Vary the length of your sentences. For example, you might use one compound sentence followed by a simple sentence. By varying the lengths of your sentences, you make your writing much more interesting to read. 

A compound sentence contains two independent clauses joined by and , or , nor , for , yet , but or so . Conscious use of each one of these 7 words can change the relationship between the clauses. Few examples for compound sentences are,... 

We mentioned before that enantiomers are two compounds that are nonsuperim-posable mirror images. Let s first clear up the term enantiomers, since students will often use this word incorrectly in a sentence. Let s compare it to people again. If two boys are born to the same parents, those boys are called brothers. Each one is the brother of the other. If you had to describe both of them, you say that they are brothers. Similarly, when you have two compounds that are non-superimposable mirror images, they are called enantiomers. Each one is the enantiomer of the other. Together, they are a pair of enantiomers. But what do we mean by nonsuperimposable mirror images Let s go back to the brother analogy to explain it. 

C21-0024. List the major industrial compounds containing main group elements and write a one-sentence description of the industrial importance of each. 

So much for one chiral centre. The problems really begin when you come up against molecules which have two or more chiral centres With two chiral centres, we can construct four possible stereoisomers. These can be separated into two enantiomeric pairs (indistinguishable by NMR). But, (key sentence coming up) if we compare one member of each of these enantiomeric pairs, we will find that they may be distinguished from each other by NMR, because they are diastereoisomers. Diastereoisomers are stereoisomers which are not mirror images of each other - they are different compounds with distinct physical and chemical properties. See Figure 6.1 if this isn t clear. 

This class of compounds is defined to have some of the three conjugated double bonds found in the ring and others not. This class includes the isomeric 3,3 -bis(cyclohexenylidenes), 100 and 101. Roth shows us that the two isomers have the same enthalpy of formation within ca 1 kJmol-1, a difference somewhat smaller than the 4 kJmol-1 found for the totally acyclic 1,3,5-hexatrienes, 79 and 80 respectively. Naively these two sets of trienes should have the same (E)/(Z) enthalpy difference. Given experimental uncertainties, we will not attempt to explain the difference69. We may compare 100 and 101 with phenylcyclohexane, 102, an isomeric species which also has the same carbon skeleton. There is nearly a 110 kJ mol-1 enthalpy of formation difference between the semicyclic and cyclic trienes. We are not surprised, for the word cyclic is customarily replaced by aromatic when in the context of the previous sentence. 

Lanthanides properties and general references. For a systematic treatment and general references of the physical and chemical properties of the rare earths and their compounds and alloys mention can be made to a periodical publication in which several contributions to these subjects are being collected. See for instance Gschneidner and Eyring (1978) and Gschneidner etal. (2005). We would also like to quote a sentence, included in the prefaces of all these books, which hints at the complexity and richness of the rare earth behaviour and the ever-increasing interest in their properties and applications. The mentioned sentence is as follows ... 

For each of the following terms, write a sentence that shows your understanding of its meaning, organic chemistry organic compounds... 

The names of compounds are capitalized only at the start of a sentence, in which case only the hrst letter is capitalized. Even at the start of a sentence, words that signal stereochemistry—such as ortho (o), meta (m), para (p), ds, and trans—are lowercase (and italicized). 

After being introduced, 1 and 2 can be used instead of the compound names, thereby saving considerable space. The numbers are bolded so that they can be easily differentiated from other numbers in the sentence, such as citation... 

For example, Plaper et al. (2002) state that three Cr + compounds were examined (work done In the past) but that the hydroxyl radical is a known mediator of DNA damage (knowledge that exists in the present). Similarly, the present-tense, active-voice combination Is used in the Discussion section to state scientific truths (knowledge expected to be true over time), just as it was in the Results section. Note that Interpretations and/or mechanisms put forth in a Discussion section are often considered to be truths and therefore are stated in present-tense active voice. Table 5.1 summarizes common verb tense—voice combinations and their functions, with example sentences. 

Excerpt 8J describes a chemical synthesis. It is quite short (55 words) and includes a graphic. This work (i.e., the work to be presented) is addressed in the first sentence. Compound labels (bolded numbers 1, 2, 3, and 4) are used to link the compounds named in the text to their respective structures in the graphic. Excerpt 8K is longer (150 words). Again, the authors mention their own work in the first sentence (the fractionation and analysis of cranberry fruit for flavonoids). However, flavonoids are not defined, their importance is not emphasized, and no gap is suggested. 

Beginning writers often choose words for their goals and objectives that either are too nonspecihc or overstate their case. For example, a novice writer might say We will see if this is the case or We will discover important new compounds. Although both sentences are grammatically correct, the first is too nonspecific (what exactly does the writer mean by the word see ) and the second is overstated (what if new compounds are not discovered ). Another common mistake is to overuse the word experiment. The word experiment usually connotes a single event (e.g., In today s experiment, we will synthesize cyclohexane. ). Research involves countless experiments, which can span months or years hence, scientists prefer words such as work, project, or study. These and other words and... 

Explanation In the sentence with the which clause, which introduces extra information about the dimeric compounds (the phrase before it). That information is not essential to the meaning of the sentence. Thus, the which clause could be deleted without sacrificing the authors intended message. Notice that the extra information, introduced by which, is set off by commas. 

Section 3.2.6 begins with the sentence Although they do not appear to have been used (at least deliberately) to form films, there are other slow anion-generating reactions. And near the end of this section is written It should be stressed that these reactions were used to form precipitates and not films. There is no guarantee that films can be formed using these reactions. However, it is reasonable to expect that, under the right conditions, it may be possible to produce films of these compounds. It is left as an exercise for the curious reader to find these right conditions. ... 

After you understand how to interpret chemical symbols, the names of compounds (see Chapter 6), and the symbols in Table 8-1, you can understand almost anything. You re equipped, for example, to decode a chemical equation into an English sentence describing a reaction. Conversely, you can translate an English sentence into the chemical equation it describes. When you re fluent in this language, you regrettably won t be able to talk to the animals you will, however, be able to describe their metabolism in great detail. 

HO-DMT is a minor metabolite of DMT in man, and it was studied for the same reasons. Could this compound play a role in explaining the activity of the parent dialkylamine It was explored in a series of subjects who had responded spectacularly to DMT. The five volunteers in this study were former opium addicts who were serving sentences for violation of United States narcotics laws. They were administered 6-HO-DMT at either 0.75 mg/Kg (one subject) or 1.0 mg/Kg (four subjects) and reported no differences from the inactive placebo control. The objective measures (blood pressure, respiration and heart rate, pupillary dilation) confirmed this absence of activity at this level. The active control drug was DMT itself, and it showed the expected responses in all regards. 

He knew that thallium compounds had no smell or taste and that the symptoms of poisoning could easily be mistaken for a variety of other ailments. But he wasn t quite as smart as he thought — Trepal neglected to get rid of the evidence. Police found a vial containing remnants of thallium nitrate in his home. George James Trepal now sits on death row while his lawyers attempt to cast doubt on the chemical evidence. And he s not the only thallium murderer to have received the death sentence. In Pennsylvania, Joann Curley awaits the same fate. 

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