Alkynes are hydrocarbons that have a triple bond between two carbon atoms, with the formula C < sub > n </ sub > H < sub > 2n-2 </ sub >.

Alkynes are characteristically more unsaturated than alkenes.

Alkynes are usually more reactive than alkenes.

Alkynes characteristically undergo reactions that show that they are " doubly unsaturated ," meaning that each alkyne unit is capable of adding two equivalents of H < sub > 2 </ sub >, halogens or related HX reagents ( X = halide, pseudohalide, etc .).

< td > Alkynes </ td >

Alkynes can be prepared from aldehydes using the Corey-Fuchs reaction and from aldehydes or ketones by the Seyferth – Gilbert homologation.

Alkynes undergo diverse cycloaddition reactions.

Alkynes occur in some pharmaceuticals, including the contraceptive norethynodrel.

Alkynes react similarly, forming the tetrahalo compounds.

Yet titles are traditionally given only to management men, and income tends to rise with title.

The Lissamphibia, superorder Salientia, are traditionally divided into three orders, but an extinct salamander-like family, the Albanerpetontidae, is now considered part of the Lissamphibia alongside the superorder Salientia.

Though the prokaryotic cyanobacteria ( commonly referred to as blue-green algae ) were traditionally included as " algae " in older textbooks, many modern sources regard this as outdated as they are now considered to be bacteria.

Furniture has been traditionally elaborately carved and in many Alpine countries carpentry skills are passed from generation to generation.

The canonic nine are traditionally divided into two groups, with Alcaeus, Sappho and Anacreon, being ' monodists ' or ' solo-singers ', with the following characteristics:

Animal glues are traditionally used in bookbinding, wood joining, and many other areas but now are largely replaced by synthetic glues.

A normal activity for high schools in the US is attending Friday night football games in Autumn, while Sunday afternoons are reserved for the professional game, particularly the National Football League, and Saturdays are traditionally used for college football.

Television stations and networks, particularly in North America, traditionally begin their regular seasons in autumn, with new series and new episodes of existing series debuting mostly during late September ( series that debut outside the fall season are usually known as midseason replacements ).

The marginally fertile parts are primarily utilised as rangelands and have been traditionally used for sheep or cattle grazing, on cattle stations which are leased from the Federal Government.

The marginally fertile parts are primarily utilised as rangelands and have been traditionally used for sheep or cattle grazing, on cattle stations which are leased from the Federal Government.

In a typical case of running amok, a male who has shown no previous sign of anger or any inclination to violence will acquire a weapon, traditionally a sword or dagger, but presently a variety of weapons are used, and in a sudden frenzy, will attempt to kill or seriously injure anyone he encounters.

It is invoked after the recitation or singing of the Canticles, and it is the only part of the services in which the congregation traditionally turns to face the altar, if they are seated transversely in the quire.

Although agriculture is almost all in private hands, farms are small and inefficient, and the republic traditionally is a net importer of food.

2002 ) suggests that Capparaceae as traditionally circumscribed are paraphyletic with respect to Brassicaceae, with Cleome and several related genera being more closely related to Brassicaceae than to other Capparaceae.

Wins are paid out at 1: 1, or equal to the wager, except for winning blackjacks, which are traditionally paid at 3: 2 ( meaning the player receives three dollars for every two bet ), or one and a half times the wager.

Most bokbiers tend to be seasonal beers ( traditionally autumn, although there are currently also spring, summer and winter boks ).

Although many assume that the biblical Mark the Cousin of Barnabas ( Colossians 4: 10 ) is the same as John Mark ( Acts 12: 12, 25 ; 13: 5, 13 ; 15: 37 ) and Mark the Evangelist, the traditionally believed author of the Gospel of Mark, according to Hippolytus of Rome, the three " Mark " s are distinct persons.

Trading firms are traditionally well represented in the Basel Region.

Although traditionally such cladograms were generated largely on the basis of morphological characters and originally calculated by hand, genetic sequencing data and computational phylogenetics are now very commonly used in phylogenetic analysis.

I have just asked these questions in the Pentagon, in the White House, in offices of key scientists across the country and aboard the submarines that prowl for months underwater, with neat rows of green launch tubes which contain Polaris missiles and which are affectionately known as `` Sherwood Forest ''.

More potent a charm to bring back that time of life than this record of a few pictures and a few remembered facts would be a catalogue of the minutiae which are of the very stuff of the mind, intrinsic, because they were known in the beginning not by the eye alone but by the hand that held them.

I have known some men and women who said that the selves they are told about or even remember seem utter strangers to them now ; ;

But the best known exploiters of the new medium are Kenneth Rexroth and Kenneth Patchen.

Both men are known to be honest and public-spirited.

You have heard him tell these young people that during his almost 50 years of service in the Congress he has seen the Kaisers and the Hitlers and the Mussolinis, the Tojos and Stalins and Khrushchevs, come and go and that we are passing on to them the freest Nation that mankind has ever known.

There are hereby created in the Treasury of the United States ( 1 ) a special fund to be known as the Yugoslav Claims Fund ; ;

Control would be limited to those rodents for which economical means of control are known.

For the making of selections on the basis of excellence requires that any foundation making the selections shall have available the judgments of a corps of advisors whose judgments are known to be good: such judgments can be known to be good only by the records of those selected, by records made subsequent to their selection over considerable periods of time.

Missiles are very valuable weapons, but they also have their too little known limitations.

Agents that are known to cause frequent infections among laboratory workers such as those causing Q fever, tularemia, brucellosis, glanders, coccidioidomycosis, etc., belong in this category.

However, it is not known to either the union or the public precisely how much of a cost increase is caused by a given change in the basic wage rate, although the companies are presumed to have reliable estimates of this magnitude.

However that may be, people are known to go to mediums for diverse reasons.

that is, it is known empirically that names beginning with R are more common than those beginning with Z ; ;

And there are some positive results, though the final findings will not be known for a long time -- and then further research can be formulated.

Consultation with a reputable wine dealer and constant experimentation -- `` steering ever from the known to the unknown '' -- are the requisites.

Coconuts, the fruit of the coconut palm, have the largest of all known seeds and are grown in South Pacific islands as a crop for domestic and export markets.

Some are so filled with gratitude, for the gift of life and the love of God, that their joy spills out on the paper and brightens the lives of thousands whom they have never known, and will never see.

Although there are seven other types of annual awards presented by the Academy ( the Irving G. Thalberg Memorial Award, the Jean Hersholt Humanitarian Award, the Gordon E. Sawyer Award, the Scientific and Engineering Award, the Technical Achievement Award, the John A. Bonner Medal of Commendation, and the Student Academy Award ) plus two awards that are not presented annually ( the Special Achievement Award in the form of an Oscar statuette and the Honorary Award that may or may not be in the form of an Oscar statuette ), the best known one is the Academy Award of Merit more popularly known as the Oscar statuette.

In comedy, several players are emerging in the image of the very popular Rouiched which is illustrated in several films such as Hassan Terro or Hassan Taxi, or actor Hadj Abderrahmane better known under the pseudonym of the Inspector Tahar in 1973 comedy The Holiday of The Inspector Tahar directed by Musa Haddad.

The defining goals of alchemy are often given as the transmutation of common metals into gold ( known as chrysopoeia ), the creation of a panacea, and the discovery of a universal solvent.